{
  "frontmatter": {
    "title": "Interactive Components",
    "description": "How does open-science allow us to reimagine how we stand on the shoulders of giants?",
    "date": "2021-01-27T18:55:00.000Z",
    "author": ["@rowanc1"],
    "name": "communicating-science",
    "oxa": "oxa:AVQ2dzLNloEd25Io8NbA/qejlAHZA1c1plMBozBGl"
  },
  "mdast": {
    "type": "root",
    "children": [
      {
        "type": "block",
        "meta": "{\"oxa\":\"oxa:AVQ2dzLNloEd25Io8NbA/8Avcz3QGT8eSeauIjdLn.8\"}",
        "children": [
          {
            "type": "heading",
            "depth": 2,
            "children": [
              { "type": "text", "value": "Park Admission", "key": "FGZzciCoWs" }
            ],
            "key": "jA2zodv58A"
          },
          {
            "type": "r:var",
            "name": "visitors",
            "value": "3",
            "format": ".0f",
            "key": "JrhNxdfUEz"
          },
          {
            "type": "r:var",
            "name": "cost",
            "value": "5.00",
            "format": "$,.2f",
            "key": "QxV1r3Xu8N"
          },
          {
            "type": "paragraph",
            "children": [
              { "type": "text", "value": "If there are ", "key": "neenTWsOfX" },
              { "type": "r:display", "valueFunction": "visitors", "key": "pgsn0rilEG" },
              {
                "type": "text",
                "value": " visitors and admission cost ",
                "key": "PhunaW79WU"
              },
              {
                "type": "r:display",
                "valueFunction": "cost",
                "format": "$,.2f",
                "key": "azaBnf4zvt"
              },
              { "type": "text", "value": ", then we would make ", "key": "KkiNqwUpLo" },
              {
                "type": "r:display",
                "valueFunction": "cost * visitors",
                "format": "$.2f",
                "key": "Pr1GfpoYav"
              },
              { "type": "text", "value": "!!", "key": "WcP5uu4jga" },
              {
                "type": "footnoteReference",
                "identifier": "1",
                "label": "1",
                "key": "quytAE3YTv"
              },
              { "type": "text", "value": ".", "key": "iqAENMaFmc" }
            ],
            "key": "E19gWSGoHm"
          },
          {
            "type": "paragraph",
            "children": [
              {
                "type": "strong",
                "children": [{ "type": "text", "value": "Cost:", "key": "MYLOWCR2tm" }],
                "key": "NdZkAH8toN"
              },
              { "type": "text", "value": " ", "key": "UM288Kzasw" },
              {
                "type": "r:range",
                "valueFunction": "cost",
                "changeFunction": "{cost: value}",
                "key": "VVW1BIuBgf"
              }
            ],
            "key": "vv3h1fMsEO"
          },
          {
            "type": "paragraph",
            "children": [
              {
                "type": "strong",
                "children": [
                  { "type": "text", "value": "Visitors:", "key": "Cs0ctTCc0X" }
                ],
                "key": "zd2VWh0528"
              },
              { "type": "text", "value": " ", "key": "BIlCsklJpY" },
              {
                "type": "r:range",
                "valueFunction": "visitors",
                "changeFunction": "{visitors: value}",
                "key": "NeTsmxFf0q"
              }
            ],
            "key": "AvioUOqkxY"
          }
        ],
        "key": "WkeTwmyIbb"
      },
      {
        "type": "block",
        "children": [
          {
            "type": "heading",
            "depth": 2,
            "children": [
              {
                "type": "text",
                "value": "Starting a SaaS Business",
                "key": "WvEqYTXpsR"
              }
            ],
            "key": "Pd91Jql2zu"
          },
          {
            "type": "admonition",
            "kind": "important",
            "children": [
              {
                "type": "admonitionTitle",
                "children": [
                  { "type": "text", "value": "Important", "key": "vzumZD7yoq" }
                ],
                "key": "Sfc9b70qy1"
              },
              {
                "type": "paragraph",
                "children": [
                  {
                    "type": "text",
                    "value": "These were some of the notes that I took while taking a course at ",
                    "key": "kHgkxcmJ14"
                  },
                  {
                    "type": "link",
                    "url": "https://leanstack.com/",
                    "children": [
                      {
                        "type": "text",
                        "value": "https://leanstack.com/",
                        "key": "fnRz2ZkbrN"
                      }
                    ],
                    "key": "YlkiWJzlus"
                  }
                ],
                "key": "L0k6989XHN"
              }
            ],
            "key": "tH6fLYibvd"
          },
          {
            "type": "r:var",
            "name": "goal",
            "value": "1000000",
            "format": ".0f",
            "key": "AHQkGwfaED"
          },
          {
            "type": "r:var",
            "name": "revenue",
            "value": "12",
            "format": ".0f",
            "key": "V7SHzjMkwa"
          },
          {
            "type": "r:var",
            "name": "retention",
            "value": "2",
            "format": ".1f",
            "key": "In4RQu7hfH"
          },
          {
            "type": "r:var",
            "name": "acquisition",
            "value": "0.1",
            "format": ".0%",
            "key": "p5WFF7nYVh"
          },
          {
            "type": "r:var",
            "name": "conversion",
            "value": "0.01",
            "format": ".0%",
            "key": "jZnf5MKeWG"
          },
          {
            "type": "r:var",
            "name": "referral",
            "value": "0.1",
            "format": ".0f%",
            "key": "WcglosoQpa"
          },
          {
            "type": "r:var",
            "name": "growth",
            "value": "10",
            "format": ".0f",
            "key": "m4eaBIOUDC"
          },
          {
            "type": "r:var",
            "name": "active_customers",
            "valueFunction": "goal / (revenue * 12)",
            "format": ".0f",
            "key": "rbAko11Vlu"
          },
          {
            "type": "r:var",
            "name": "lifetime_value",
            "valueFunction": "revenue * 12 * retention",
            "format": ".0f",
            "key": "FxEDQ9Vagm"
          },
          {
            "type": "r:var",
            "name": "throughput",
            "valueFunction": "goal / lifetime_value",
            "format": ".0f",
            "key": "wqdqBSZRpn"
          },
          {
            "type": "r:var",
            "name": "new_customers",
            "valueFunction": "active_customers / retention",
            "format": ".0f",
            "key": "OUaJVDOV1n"
          },
          {
            "type": "paragraph",
            "children": [
              {
                "type": "strong",
                "children": [
                  {
                    "type": "text",
                    "value": "Minimum Success Criteria:",
                    "key": "wQUGsMwbiO"
                  }
                ],
                "key": "rIAjjKjJvi"
              },
              { "type": "text", "value": " ", "key": "cDQfq26iud" },
              {
                "type": "r:range",
                "valueFunction": "goal",
                "changeFunction": "{goal: value}",
                "min": "25000",
                "max": "2000000",
                "step": "25000",
                "key": "BU6Bz6I5qD"
              },
              {
                "type": "r:dynamic",
                "valueFunction": "goal",
                "changeFunction": "{goal: value}",
                "format": "$,.0f",
                "min": "100000",
                "max": "2000000",
                "step": "25000",
                "key": "imNkCnh1jP"
              },
              {
                "type": "text",
                "value": " annual revenue by year three.",
                "key": "RyKWeNxtSN"
              }
            ],
            "key": "MBgcG6WpwH"
          },
          {
            "type": "paragraph",
            "children": [
              {
                "type": "strong",
                "children": [
                  { "type": "text", "value": "Price:", "key": "ltbvOpsX6M" }
                ],
                "key": "YC7Tof6u7g"
              },
              {
                "type": "r:range",
                "valueFunction": "revenue",
                "changeFunction": "{revenue: value}",
                "key": "oGYnD0EERf"
              },
              {
                "type": "r:display",
                "valueFunction": "revenue",
                "format": "$",
                "key": "fgvVNJ44Hu"
              },
              { "type": "text", "value": "/user/month", "key": "QiJOE8becV" }
            ],
            "key": "a9zKiVPuUm"
          },
          {
            "type": "paragraph",
            "children": [
              {
                "type": "text",
                "value": "Based on your minimum success criteria of ",
                "key": "FjCtJlOuT3"
              },
              {
                "type": "r:dynamic",
                "valueFunction": "goal",
                "changeFunction": "{goal: value}",
                "format": "$,.0f",
                "min": "100000",
                "max": "2000000",
                "step": "25000",
                "key": "qb4oKOZd1H"
              },
              {
                "type": "text",
                "value": " per year with a pricing model of ",
                "key": "Vvnyzlzg03"
              },
              {
                "type": "r:dynamic",
                "valueFunction": "revenue",
                "changeFunction": "{revenue: value}",
                "format": "$.0f",
                "key": "V3hCl149Ts"
              },
              {
                "type": "text",
                "value": "/month, an expected customer lifetime of ",
                "key": "aZiOaFki18"
              },
              {
                "type": "r:dynamic",
                "valueFunction": "retention",
                "changeFunction": "{retention: value}",
                "format": ".1f",
                "max": "5",
                "step": "0.1",
                "key": "toX8h22XRW"
              },
              {
                "type": "text",
                "value": " years, an expected acquisition rate of ",
                "key": "VE197Id0lT"
              },
              {
                "type": "r:dynamic",
                "valueFunction": "acquisition",
                "changeFunction": "{acquisition: value}",
                "format": ".0%",
                "max": "0.2",
                "step": "0.01",
                "key": "DbtF9ba5sR"
              },
              {
                "type": "text",
                "value": " and a customer referral rate of ",
                "key": "T6c2XqzpZu"
              },
              {
                "type": "r:dynamic",
                "valueFunction": "referral",
                "changeFunction": "{referral: value}",
                "format": ".0%",
                "max": "0.2",
                "step": "0.01",
                "key": "J50m7dYH1W"
              },
              { "type": "text", "value": ".", "key": "cp2ShF65hZ" }
            ],
            "key": "VjukwNvTKy"
          },
          {
            "type": "admonition",
            "kind": "important",
            "children": [
              {
                "type": "admonitionTitle",
                "children": [
                  { "type": "text", "value": "Important", "key": "nv6oN4f7A1" }
                ],
                "key": "R1gd1H41I3"
              },
              {
                "type": "paragraph",
                "children": [
                  { "type": "text", "value": "You will need ", "key": "ffL2j69uYR" },
                  {
                    "type": "strong",
                    "children": [
                      {
                        "type": "r:display",
                        "valueFunction": "active_customers",
                        "format": ".0f",
                        "key": "XG3IcFZxuZ"
                      }
                    ],
                    "key": "aylPD58Hgd"
                  },
                  {
                    "type": "text",
                    "value": " customers in year three.",
                    "key": "geQHh4x2vR"
                  }
                ],
                "key": "Aq7MCcqWKz"
              }
            ],
            "key": "tUC1RWilQL"
          },
          {
            "type": "paragraph",
            "children": [
              {
                "type": "text",
                "value": "The lifetime value of your customer is ",
                "key": "naTmpfelZa"
              },
              {
                "type": "r:display",
                "valueFunction": "lifetime_value",
                "format": "$.0f",
                "key": "Q7zoCLemMD"
              },
              {
                "type": "text",
                "value": ". That means that the throughput is ",
                "key": "cxPzt2jsdK"
              },
              {
                "type": "r:display",
                "valueFunction": "throughput",
                "format": ".0f",
                "key": "sE7H27biuI"
              },
              {
                "type": "text",
                "value": " new customers per year.",
                "key": "kAz7BCCb6k"
              }
            ],
            "key": "qEhHPgV9ee"
          },
          {
            "type": "paragraph",
            "children": [
              {
                "type": "text",
                "value": "With a lifetime value of ",
                "key": "RL4CdU8rAe"
              },
              {
                "type": "r:dynamic",
                "valueFunction": "retention",
                "changeFunction": "{retention: value}",
                "format": ".1f",
                "max": "5",
                "step": "0.1",
                "key": "daFtJ8wofv"
              },
              {
                "type": "text",
                "value": " years, to maintain that revenue you will need ",
                "key": "EYUXbWEgJ4"
              },
              {
                "type": "r:display",
                "valueFunction": "new_customers",
                "key": "Tgac0AAEVt"
              },
              {
                "type": "text",
                "value": " new customers every year! But it gets worse, to create a new customer you need to start with leads.",
                "key": "wx3gPYZrqP"
              }
            ],
            "key": "ISP4N4XTEP"
          },
          {
            "type": "directive",
            "kind": "margin",
            "value": "SaaS products report (on average) a 1% paid conversion. This is an aggregate of hundreds of thousands of companies, so you might do better than that, but don’t delude yourself in thinking that you will have a 10% conversion rate!",
            "key": "DqqJAp7XUU"
          },
          {
            "type": "list",
            "ordered": false,
            "spread": false,
            "children": [
              {
                "type": "listItem",
                "spread": true,
                "children": [
                  {
                    "type": "text",
                    "value": "With a conversion rate of ",
                    "key": "KQeh3xA5TH"
                  },
                  {
                    "type": "r:dynamic",
                    "valueFunction": "conversion",
                    "changeFunction": "{conversion: value}",
                    "format": ".1%",
                    "min": "0.001",
                    "max": "0.1",
                    "step": "0.001",
                    "key": "MgdtY0tlNU"
                  },
                  { "type": "text", "value": ", you will need ", "key": "yz1vYQ1ICD" },
                  {
                    "type": "strong",
                    "children": [
                      {
                        "type": "r:display",
                        "valueFunction": "new_customers / conversion",
                        "format": ",.0f",
                        "key": "b62SptQ7mP"
                      }
                    ],
                    "key": "YG3v2c4IaC"
                  },
                  { "type": "text", "value": " new ", "key": "vaRCG4Eru1" },
                  {
                    "type": "strong",
                    "children": [
                      { "type": "text", "value": "visitors", "key": "a6HUh958nW" }
                    ],
                    "key": "ugX7ysj8d3"
                  },
                  {
                    "type": "text",
                    "value": " to your website per year, or ",
                    "key": "BLB5qChFMo"
                  },
                  {
                    "type": "r:display",
                    "valueFunction": "new_customers / conversion / 365",
                    "format": ",.0f",
                    "key": "FKWlbN7bib"
                  },
                  { "type": "text", "value": " new ", "key": "nD4q7e8loZ" },
                  {
                    "type": "strong",
                    "children": [
                      { "type": "text", "value": "visitors", "key": "rvPOuJ6hqd" }
                    ],
                    "key": "qvOwaoSnfE"
                  },
                  { "type": "text", "value": " every day!", "key": "cPdxxLUo4b" }
                ],
                "key": "XkRRtw75iw"
              }
            ],
            "key": "YubbsvDZv1"
          },
          {
            "type": "paragraph",
            "children": [
              {
                "type": "strong",
                "children": [
                  { "type": "text", "value": "Things to change:", "key": "nFZLQ9u03F" }
                ],
                "key": "CayXkwCoxU"
              }
            ],
            "key": "OQ5eER1Am5"
          },
          {
            "type": "list",
            "ordered": false,
            "spread": false,
            "children": [
              {
                "type": "listItem",
                "spread": true,
                "children": [
                  {
                    "type": "text",
                    "value": "Increase utility, this will improve your customer retention. 🔧",
                    "key": "dBfxVEHhvE"
                  }
                ],
                "key": "gDlF6VDKt1"
              },
              {
                "type": "listItem",
                "spread": true,
                "children": [
                  {
                    "type": "text",
                    "value": "Increase your pricing? 💸",
                    "key": "SZS6E52iNT"
                  },
                  {
                    "type": "list",
                    "ordered": false,
                    "spread": false,
                    "children": [
                      {
                        "type": "listItem",
                        "spread": true,
                        "children": [
                          {
                            "type": "text",
                            "value": "Can you can double your pricing and not loose more than half of your customers?",
                            "key": "YTWNtmLXIY"
                          }
                        ],
                        "key": "Su3uker5c5"
                      }
                    ],
                    "key": "WBEYRY5v3b"
                  }
                ],
                "key": "nVteC6uvDf"
              }
            ],
            "key": "imbUrpJqYu"
          },
          {
            "type": "heading",
            "depth": 2,
            "children": [
              { "type": "text", "value": "Other examples:", "key": "FGZzsfciCoWs" }
            ],
            "key": "jAodsf58A"
          },
          {
            "type": "paragraph",
            "children": [
              {
                "type": "text",
                "value": "Can have ",
                "key": "dBfsVEHhvE"
              },
              {
                "type": "inlineCode",
                "value": "code",
                "key": "dBfsxVEhvE"
              }
            ]
          },
          {
            "type": "code",
            "lang": "python",
            "emphasizeLines": [2],
            "showLineNumbers": true,
            "value": "def five():\n  print('five')\n  return 5",
            "key": "YMSml3yWA3"
          },
          {
            "type": "math",
            "identifier": "hello",
            "label": "hello",
            "value": "\\begin{aligned}\n\\frac{d}{d \\tau}\\left(\\frac{\\partial \\xi^{\\alpha}}{d x^{\\mu}} \\frac{d x^{\\mu}}{d \\tau}\\right)=& \\frac{d}{d \\tau}\\left(\\frac{\\partial \\xi^{\\alpha}}{\\partial x^{\\mu}}\\right) \\frac{d x^{\\mu}}{d \\tau}+\\frac{\\partial \\xi^{\\alpha}}{\\partial x^{\\mu}} \\frac{d}{d \\tau}\\left(\\frac{d x^{\\mu}}{d \\tau}\\right) \\\\\n&=\\frac{\\partial}{\\partial x^{v}}\\left(\\frac{\\partial \\xi^{\\alpha}}{\\partial x^{\\mu}}\\right) \\frac{d x^{v}}{d \\tau} \\frac{d x^{\\mu}}{d \\tau}+\\frac{\\partial \\xi^{\\alpha}}{\\partial x^{\\mu}} \\frac{d^{2} x^{\\mu}}{d \\tau^{2}} \\\\\n&=\\frac{\\partial \\xi^{\\alpha}}{\\partial x^{v} \\partial x^{v}} \\frac{d x^{v}}{d \\tau} \\frac{d x^{\\mu}}{d \\tau}+\\frac{\\partial \\xi^{\\alpha}}{\\partial x^{\\mu}} \\frac{d^{2} x^{\\mu}}{d \\tau^{2}}=0\n\\end{aligned}",
            "html": "<span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\"><math xmlns=\"http://www.w3.org/1998/Math/MathML\" display=\"block\"><semantics><mtable rowspacing=\"0.25em\" columnalign=\"right left\" columnspacing=\"0em\"><mtr><mtd><mstyle scriptlevel=\"0\" displaystyle=\"true\"><mrow><mfrac><mi>d</mi><mrow><mi>d</mi><mi>τ</mi></mrow></mfrac><mrow><mo fence=\"true\">(</mo><mfrac><mrow><mi mathvariant=\"normal\">∂</mi><msup><mi>ξ</mi><mi>α</mi></msup></mrow><mrow><mi>d</mi><msup><mi>x</mi><mi>μ</mi></msup></mrow></mfrac><mfrac><mrow><mi>d</mi><msup><mi>x</mi><mi>μ</mi></msup></mrow><mrow><mi>d</mi><mi>τ</mi></mrow></mfrac><mo fence=\"true\">)</mo></mrow><mo>=</mo></mrow></mstyle></mtd><mtd><mstyle scriptlevel=\"0\" displaystyle=\"true\"><mrow><mrow></mrow><mfrac><mi>d</mi><mrow><mi>d</mi><mi>τ</mi></mrow></mfrac><mrow><mo fence=\"true\">(</mo><mfrac><mrow><mi mathvariant=\"normal\">∂</mi><msup><mi>ξ</mi><mi>α</mi></msup></mrow><mrow><mi mathvariant=\"normal\">∂</mi><msup><mi>x</mi><mi>μ</mi></msup></mrow></mfrac><mo fence=\"true\">)</mo></mrow><mfrac><mrow><mi>d</mi><msup><mi>x</mi><mi>μ</mi></msup></mrow><mrow><mi>d</mi><mi>τ</mi></mrow></mfrac><mo>+</mo><mfrac><mrow><mi mathvariant=\"normal\">∂</mi><msup><mi>ξ</mi><mi>α</mi></msup></mrow><mrow><mi mathvariant=\"normal\">∂</mi><msup><mi>x</mi><mi>μ</mi></msup></mrow></mfrac><mfrac><mi>d</mi><mrow><mi>d</mi><mi>τ</mi></mrow></mfrac><mrow><mo fence=\"true\">(</mo><mfrac><mrow><mi>d</mi><msup><mi>x</mi><mi>μ</mi></msup></mrow><mrow><mi>d</mi><mi>τ</mi></mrow></mfrac><mo fence=\"true\">)</mo></mrow></mrow></mstyle></mtd></mtr><mtr><mtd><mstyle scriptlevel=\"0\" displaystyle=\"true\"><mrow></mrow></mstyle></mtd><mtd><mstyle scriptlevel=\"0\" displaystyle=\"true\"><mrow><mrow></mrow><mo>=</mo><mfrac><mi mathvariant=\"normal\">∂</mi><mrow><mi mathvariant=\"normal\">∂</mi><msup><mi>x</mi><mi>v</mi></msup></mrow></mfrac><mrow><mo fence=\"true\">(</mo><mfrac><mrow><mi mathvariant=\"normal\">∂</mi><msup><mi>ξ</mi><mi>α</mi></msup></mrow><mrow><mi mathvariant=\"normal\">∂</mi><msup><mi>x</mi><mi>μ</mi></msup></mrow></mfrac><mo fence=\"true\">)</mo></mrow><mfrac><mrow><mi>d</mi><msup><mi>x</mi><mi>v</mi></msup></mrow><mrow><mi>d</mi><mi>τ</mi></mrow></mfrac><mfrac><mrow><mi>d</mi><msup><mi>x</mi><mi>μ</mi></msup></mrow><mrow><mi>d</mi><mi>τ</mi></mrow></mfrac><mo>+</mo><mfrac><mrow><mi mathvariant=\"normal\">∂</mi><msup><mi>ξ</mi><mi>α</mi></msup></mrow><mrow><mi mathvariant=\"normal\">∂</mi><msup><mi>x</mi><mi>μ</mi></msup></mrow></mfrac><mfrac><mrow><msup><mi>d</mi><mn>2</mn></msup><msup><mi>x</mi><mi>μ</mi></msup></mrow><mrow><mi>d</mi><msup><mi>τ</mi><mn>2</mn></msup></mrow></mfrac></mrow></mstyle></mtd></mtr><mtr><mtd><mstyle scriptlevel=\"0\" displaystyle=\"true\"><mrow></mrow></mstyle></mtd><mtd><mstyle scriptlevel=\"0\" displaystyle=\"true\"><mrow><mrow></mrow><mo>=</mo><mfrac><mrow><mi mathvariant=\"normal\">∂</mi><msup><mi>ξ</mi><mi>α</mi></msup></mrow><mrow><mi mathvariant=\"normal\">∂</mi><msup><mi>x</mi><mi>v</mi></msup><mi mathvariant=\"normal\">∂</mi><msup><mi>x</mi><mi>v</mi></msup></mrow></mfrac><mfrac><mrow><mi>d</mi><msup><mi>x</mi><mi>v</mi></msup></mrow><mrow><mi>d</mi><mi>τ</mi></mrow></mfrac><mfrac><mrow><mi>d</mi><msup><mi>x</mi><mi>μ</mi></msup></mrow><mrow><mi>d</mi><mi>τ</mi></mrow></mfrac><mo>+</mo><mfrac><mrow><mi mathvariant=\"normal\">∂</mi><msup><mi>ξ</mi><mi>α</mi></msup></mrow><mrow><mi mathvariant=\"normal\">∂</mi><msup><mi>x</mi><mi>μ</mi></msup></mrow></mfrac><mfrac><mrow><msup><mi>d</mi><mn>2</mn></msup><msup><mi>x</mi><mi>μ</mi></msup></mrow><mrow><mi>d</mi><msup><mi>τ</mi><mn>2</mn></msup></mrow></mfrac><mo>=</mo><mn>0</mn></mrow></mstyle></mtd></mtr></mtable><annotation encoding=\"application/x-tex\">\\begin{aligned}\n\\frac{d}{d \\tau}\\left(\\frac{\\partial \\xi^{\\alpha}}{d x^{\\mu}} \\frac{d x^{\\mu}}{d \\tau}\\right)=&amp; \\frac{d}{d \\tau}\\left(\\frac{\\partial \\xi^{\\alpha}}{\\partial x^{\\mu}}\\right) \\frac{d x^{\\mu}}{d \\tau}+\\frac{\\partial \\xi^{\\alpha}}{\\partial x^{\\mu}} \\frac{d}{d \\tau}\\left(\\frac{d x^{\\mu}}{d \\tau}\\right) \\\\\n&amp;=\\frac{\\partial}{\\partial x^{v}}\\left(\\frac{\\partial \\xi^{\\alpha}}{\\partial x^{\\mu}}\\right) \\frac{d x^{v}}{d \\tau} \\frac{d x^{\\mu}}{d \\tau}+\\frac{\\partial \\xi^{\\alpha}}{\\partial x^{\\mu}} \\frac{d^{2} x^{\\mu}}{d \\tau^{2}} \\\\\n&amp;=\\frac{\\partial \\xi^{\\alpha}}{\\partial x^{v} \\partial x^{v}} \\frac{d x^{v}}{d \\tau} \\frac{d x^{\\mu}}{d \\tau}+\\frac{\\partial \\xi^{\\alpha}}{\\partial x^{\\mu}} \\frac{d^{2} x^{\\mu}}{d \\tau^{2}}=0\n\\end{aligned}</annotation></semantics></math></span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"strut\" style=\"height:7.9183em;vertical-align:-3.7091em;\"></span><span class=\"mord\"><span class=\"mtable\"><span class=\"col-align-r\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:4.2091em;\"><span style=\"top:-6.2502em;\"><span class=\"pstrut\" style=\"height:3.4911em;\"></span><span class=\"mord\"><span class=\"mord\"><span class=\"mopen nulldelimiter\"></span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:1.3714em;\"><span style=\"top:-2.314em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord mathnormal\">d</span><span class=\"mord mathnormal\" style=\"margin-right:0.1132em;\">τ</span></span></span><span style=\"top:-3.23em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"frac-line\" style=\"border-bottom-width:0.04em;\"></span></span><span style=\"top:-3.677em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord mathnormal\">d</span></span></span></span><span class=\"vlist-s\">​</span></span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.686em;\"><span></span></span></span></span></span><span class=\"mclose nulldelimiter\"></span></span><span class=\"mspace\" style=\"margin-right:0.1667em;\"></span><span class=\"minner\"><span class=\"mopen delimcenter\" style=\"top:0em;\"><span class=\"delimsizing size3\">(</span></span><span class=\"mord\"><span class=\"mopen nulldelimiter\"></span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:1.3714em;\"><span style=\"top:-2.314em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord mathnormal\">d</span><span class=\"mord\"><span class=\"mord mathnormal\">x</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.5904em;\"><span style=\"top:-2.989em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\">μ</span></span></span></span></span></span></span></span></span></span></span><span style=\"top:-3.23em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"frac-line\" style=\"border-bottom-width:0.04em;\"></span></span><span style=\"top:-3.677em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord\" style=\"margin-right:0.05556em;\">∂</span><span class=\"mord\"><span class=\"mord mathnormal\" style=\"margin-right:0.04601em;\">ξ</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.6644em;\"><span style=\"top:-3.063em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\" style=\"margin-right:0.0037em;\">α</span></span></span></span></span></span></span></span></span></span></span></span><span class=\"vlist-s\">​</span></span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.686em;\"><span></span></span></span></span></span><span class=\"mclose nulldelimiter\"></span></span><span class=\"mord\"><span class=\"mopen nulldelimiter\"></span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:1.3714em;\"><span style=\"top:-2.314em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord mathnormal\">d</span><span class=\"mord mathnormal\" style=\"margin-right:0.1132em;\">τ</span></span></span><span style=\"top:-3.23em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"frac-line\" style=\"border-bottom-width:0.04em;\"></span></span><span style=\"top:-3.677em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord mathnormal\">d</span><span class=\"mord\"><span class=\"mord mathnormal\">x</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.6644em;\"><span style=\"top:-3.063em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\">μ</span></span></span></span></span></span></span></span></span></span></span></span><span class=\"vlist-s\">​</span></span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.686em;\"><span></span></span></span></span></span><span class=\"mclose nulldelimiter\"></span></span><span class=\"mclose delimcenter\" style=\"top:0em;\"><span class=\"delimsizing size3\">)</span></span></span><span class=\"mspace\" style=\"margin-right:0.2778em;\"></span><span class=\"mrel\">=</span></span></span><span style=\"top:-3.5091em;\"><span class=\"pstrut\" style=\"height:3.4911em;\"></span><span class=\"mord\"></span></span><span style=\"top:-0.768em;\"><span class=\"pstrut\" style=\"height:3.4911em;\"></span><span class=\"mord\"></span></span></span><span class=\"vlist-s\">​</span></span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:3.7091em;\"><span></span></span></span></span></span><span class=\"col-align-l\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:4.2091em;\"><span style=\"top:-6.2502em;\"><span class=\"pstrut\" style=\"height:3.4911em;\"></span><span class=\"mord\"><span class=\"mord\"></span><span class=\"mord\"><span class=\"mopen nulldelimiter\"></span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:1.3714em;\"><span style=\"top:-2.314em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord mathnormal\">d</span><span class=\"mord mathnormal\" style=\"margin-right:0.1132em;\">τ</span></span></span><span style=\"top:-3.23em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"frac-line\" style=\"border-bottom-width:0.04em;\"></span></span><span style=\"top:-3.677em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord mathnormal\">d</span></span></span></span><span class=\"vlist-s\">​</span></span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.686em;\"><span></span></span></span></span></span><span class=\"mclose nulldelimiter\"></span></span><span class=\"mspace\" style=\"margin-right:0.1667em;\"></span><span class=\"minner\"><span class=\"mopen delimcenter\" style=\"top:0em;\"><span class=\"delimsizing size3\">(</span></span><span class=\"mord\"><span class=\"mopen nulldelimiter\"></span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:1.3714em;\"><span style=\"top:-2.314em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord\" style=\"margin-right:0.05556em;\">∂</span><span class=\"mord\"><span class=\"mord mathnormal\">x</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.5904em;\"><span style=\"top:-2.989em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\">μ</span></span></span></span></span></span></span></span></span></span></span><span style=\"top:-3.23em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"frac-line\" style=\"border-bottom-width:0.04em;\"></span></span><span style=\"top:-3.677em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord\" style=\"margin-right:0.05556em;\">∂</span><span class=\"mord\"><span class=\"mord mathnormal\" style=\"margin-right:0.04601em;\">ξ</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.6644em;\"><span style=\"top:-3.063em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\" style=\"margin-right:0.0037em;\">α</span></span></span></span></span></span></span></span></span></span></span></span><span class=\"vlist-s\">​</span></span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.686em;\"><span></span></span></span></span></span><span class=\"mclose nulldelimiter\"></span></span><span class=\"mclose delimcenter\" style=\"top:0em;\"><span class=\"delimsizing size3\">)</span></span></span><span class=\"mspace\" style=\"margin-right:0.1667em;\"></span><span class=\"mord\"><span class=\"mopen nulldelimiter\"></span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:1.3714em;\"><span style=\"top:-2.314em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord mathnormal\">d</span><span class=\"mord mathnormal\" style=\"margin-right:0.1132em;\">τ</span></span></span><span style=\"top:-3.23em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"frac-line\" style=\"border-bottom-width:0.04em;\"></span></span><span style=\"top:-3.677em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord mathnormal\">d</span><span class=\"mord\"><span class=\"mord mathnormal\">x</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.6644em;\"><span style=\"top:-3.063em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\">μ</span></span></span></span></span></span></span></span></span></span></span></span><span class=\"vlist-s\">​</span></span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.686em;\"><span></span></span></span></span></span><span class=\"mclose nulldelimiter\"></span></span><span class=\"mspace\" style=\"margin-right:0.2222em;\"></span><span class=\"mbin\">+</span><span class=\"mspace\" style=\"margin-right:0.2222em;\"></span><span class=\"mord\"><span class=\"mopen nulldelimiter\"></span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:1.3714em;\"><span style=\"top:-2.314em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord\" style=\"margin-right:0.05556em;\">∂</span><span class=\"mord\"><span class=\"mord mathnormal\">x</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.5904em;\"><span style=\"top:-2.989em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\">μ</span></span></span></span></span></span></span></span></span></span></span><span style=\"top:-3.23em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"frac-line\" style=\"border-bottom-width:0.04em;\"></span></span><span style=\"top:-3.677em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord\" style=\"margin-right:0.05556em;\">∂</span><span class=\"mord\"><span class=\"mord mathnormal\" style=\"margin-right:0.04601em;\">ξ</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.6644em;\"><span style=\"top:-3.063em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\" style=\"margin-right:0.0037em;\">α</span></span></span></span></span></span></span></span></span></span></span></span><span class=\"vlist-s\">​</span></span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.686em;\"><span></span></span></span></span></span><span class=\"mclose nulldelimiter\"></span></span><span class=\"mord\"><span class=\"mopen nulldelimiter\"></span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:1.3714em;\"><span style=\"top:-2.314em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord mathnormal\">d</span><span class=\"mord mathnormal\" style=\"margin-right:0.1132em;\">τ</span></span></span><span style=\"top:-3.23em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"frac-line\" style=\"border-bottom-width:0.04em;\"></span></span><span style=\"top:-3.677em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord mathnormal\">d</span></span></span></span><span class=\"vlist-s\">​</span></span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.686em;\"><span></span></span></span></span></span><span class=\"mclose nulldelimiter\"></span></span><span class=\"mspace\" style=\"margin-right:0.1667em;\"></span><span class=\"minner\"><span class=\"mopen delimcenter\" style=\"top:0em;\"><span class=\"delimsizing size3\">(</span></span><span class=\"mord\"><span class=\"mopen nulldelimiter\"></span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:1.3714em;\"><span style=\"top:-2.314em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord mathnormal\">d</span><span class=\"mord mathnormal\" style=\"margin-right:0.1132em;\">τ</span></span></span><span style=\"top:-3.23em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"frac-line\" style=\"border-bottom-width:0.04em;\"></span></span><span style=\"top:-3.677em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord mathnormal\">d</span><span class=\"mord\"><span class=\"mord mathnormal\">x</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.6644em;\"><span style=\"top:-3.063em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\">μ</span></span></span></span></span></span></span></span></span></span></span></span><span class=\"vlist-s\">​</span></span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.686em;\"><span></span></span></span></span></span><span class=\"mclose nulldelimiter\"></span></span><span class=\"mclose delimcenter\" style=\"top:0em;\"><span class=\"delimsizing size3\">)</span></span></span></span></span><span style=\"top:-3.5091em;\"><span class=\"pstrut\" style=\"height:3.4911em;\"></span><span class=\"mord\"><span class=\"mord\"></span><span class=\"mspace\" style=\"margin-right:0.2778em;\"></span><span class=\"mrel\">=</span><span class=\"mspace\" style=\"margin-right:0.2778em;\"></span><span class=\"mord\"><span class=\"mopen nulldelimiter\"></span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:1.3714em;\"><span style=\"top:-2.314em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord\" style=\"margin-right:0.05556em;\">∂</span><span class=\"mord\"><span class=\"mord mathnormal\">x</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.5904em;\"><span style=\"top:-2.989em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\" style=\"margin-right:0.03588em;\">v</span></span></span></span></span></span></span></span></span></span></span><span style=\"top:-3.23em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"frac-line\" style=\"border-bottom-width:0.04em;\"></span></span><span style=\"top:-3.677em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord\" style=\"margin-right:0.05556em;\">∂</span></span></span></span><span class=\"vlist-s\">​</span></span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.686em;\"><span></span></span></span></span></span><span class=\"mclose nulldelimiter\"></span></span><span class=\"mspace\" style=\"margin-right:0.1667em;\"></span><span class=\"minner\"><span class=\"mopen delimcenter\" style=\"top:0em;\"><span class=\"delimsizing size3\">(</span></span><span class=\"mord\"><span class=\"mopen nulldelimiter\"></span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:1.3714em;\"><span style=\"top:-2.314em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord\" style=\"margin-right:0.05556em;\">∂</span><span class=\"mord\"><span class=\"mord mathnormal\">x</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.5904em;\"><span style=\"top:-2.989em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\">μ</span></span></span></span></span></span></span></span></span></span></span><span style=\"top:-3.23em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"frac-line\" style=\"border-bottom-width:0.04em;\"></span></span><span style=\"top:-3.677em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord\" style=\"margin-right:0.05556em;\">∂</span><span class=\"mord\"><span class=\"mord mathnormal\" style=\"margin-right:0.04601em;\">ξ</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.6644em;\"><span style=\"top:-3.063em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\" style=\"margin-right:0.0037em;\">α</span></span></span></span></span></span></span></span></span></span></span></span><span class=\"vlist-s\">​</span></span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.686em;\"><span></span></span></span></span></span><span class=\"mclose nulldelimiter\"></span></span><span class=\"mclose delimcenter\" style=\"top:0em;\"><span class=\"delimsizing size3\">)</span></span></span><span class=\"mspace\" style=\"margin-right:0.1667em;\"></span><span class=\"mord\"><span class=\"mopen nulldelimiter\"></span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:1.3714em;\"><span style=\"top:-2.314em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord mathnormal\">d</span><span class=\"mord mathnormal\" style=\"margin-right:0.1132em;\">τ</span></span></span><span style=\"top:-3.23em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"frac-line\" style=\"border-bottom-width:0.04em;\"></span></span><span style=\"top:-3.677em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord mathnormal\">d</span><span class=\"mord\"><span class=\"mord mathnormal\">x</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.6644em;\"><span style=\"top:-3.063em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\" style=\"margin-right:0.03588em;\">v</span></span></span></span></span></span></span></span></span></span></span></span><span class=\"vlist-s\">​</span></span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.686em;\"><span></span></span></span></span></span><span class=\"mclose nulldelimiter\"></span></span><span class=\"mord\"><span class=\"mopen nulldelimiter\"></span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:1.3714em;\"><span style=\"top:-2.314em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord mathnormal\">d</span><span class=\"mord mathnormal\" style=\"margin-right:0.1132em;\">τ</span></span></span><span style=\"top:-3.23em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"frac-line\" style=\"border-bottom-width:0.04em;\"></span></span><span style=\"top:-3.677em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord mathnormal\">d</span><span class=\"mord\"><span class=\"mord mathnormal\">x</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.6644em;\"><span style=\"top:-3.063em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\">μ</span></span></span></span></span></span></span></span></span></span></span></span><span class=\"vlist-s\">​</span></span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.686em;\"><span></span></span></span></span></span><span class=\"mclose nulldelimiter\"></span></span><span class=\"mspace\" style=\"margin-right:0.2222em;\"></span><span class=\"mbin\">+</span><span class=\"mspace\" style=\"margin-right:0.2222em;\"></span><span class=\"mord\"><span class=\"mopen nulldelimiter\"></span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:1.3714em;\"><span style=\"top:-2.314em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord\" style=\"margin-right:0.05556em;\">∂</span><span class=\"mord\"><span class=\"mord mathnormal\">x</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.5904em;\"><span style=\"top:-2.989em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\">μ</span></span></span></span></span></span></span></span></span></span></span><span style=\"top:-3.23em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"frac-line\" style=\"border-bottom-width:0.04em;\"></span></span><span style=\"top:-3.677em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord\" style=\"margin-right:0.05556em;\">∂</span><span class=\"mord\"><span class=\"mord mathnormal\" style=\"margin-right:0.04601em;\">ξ</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.6644em;\"><span style=\"top:-3.063em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\" style=\"margin-right:0.0037em;\">α</span></span></span></span></span></span></span></span></span></span></span></span><span class=\"vlist-s\">​</span></span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.686em;\"><span></span></span></span></span></span><span class=\"mclose nulldelimiter\"></span></span><span class=\"mord\"><span class=\"mopen nulldelimiter\"></span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:1.4911em;\"><span style=\"top:-2.314em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord mathnormal\">d</span><span class=\"mord\"><span class=\"mord mathnormal\" style=\"margin-right:0.1132em;\">τ</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.7401em;\"><span style=\"top:-2.989em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mtight\">2</span></span></span></span></span></span></span></span></span></span></span><span style=\"top:-3.23em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"frac-line\" style=\"border-bottom-width:0.04em;\"></span></span><span style=\"top:-3.677em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord\"><span class=\"mord mathnormal\">d</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.8141em;\"><span style=\"top:-3.063em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mtight\">2</span></span></span></span></span></span></span></span></span><span class=\"mord\"><span class=\"mord mathnormal\">x</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.6644em;\"><span style=\"top:-3.063em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\">μ</span></span></span></span></span></span></span></span></span></span></span></span><span class=\"vlist-s\">​</span></span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.686em;\"><span></span></span></span></span></span><span class=\"mclose nulldelimiter\"></span></span></span></span><span style=\"top:-0.768em;\"><span class=\"pstrut\" style=\"height:3.4911em;\"></span><span class=\"mord\"><span class=\"mord\"></span><span class=\"mspace\" style=\"margin-right:0.2778em;\"></span><span class=\"mrel\">=</span><span class=\"mspace\" style=\"margin-right:0.2778em;\"></span><span class=\"mord\"><span class=\"mopen nulldelimiter\"></span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:1.3714em;\"><span style=\"top:-2.314em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord\" style=\"margin-right:0.05556em;\">∂</span><span class=\"mord\"><span class=\"mord mathnormal\">x</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.5904em;\"><span style=\"top:-2.989em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\" style=\"margin-right:0.03588em;\">v</span></span></span></span></span></span></span></span></span><span class=\"mord\" style=\"margin-right:0.05556em;\">∂</span><span class=\"mord\"><span class=\"mord mathnormal\">x</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.5904em;\"><span style=\"top:-2.989em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\" style=\"margin-right:0.03588em;\">v</span></span></span></span></span></span></span></span></span></span></span><span style=\"top:-3.23em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"frac-line\" style=\"border-bottom-width:0.04em;\"></span></span><span style=\"top:-3.677em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord\" style=\"margin-right:0.05556em;\">∂</span><span class=\"mord\"><span class=\"mord mathnormal\" style=\"margin-right:0.04601em;\">ξ</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.6644em;\"><span style=\"top:-3.063em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\" style=\"margin-right:0.0037em;\">α</span></span></span></span></span></span></span></span></span></span></span></span><span class=\"vlist-s\">​</span></span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.686em;\"><span></span></span></span></span></span><span class=\"mclose nulldelimiter\"></span></span><span class=\"mord\"><span class=\"mopen nulldelimiter\"></span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:1.3714em;\"><span style=\"top:-2.314em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord mathnormal\">d</span><span class=\"mord mathnormal\" style=\"margin-right:0.1132em;\">τ</span></span></span><span style=\"top:-3.23em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"frac-line\" style=\"border-bottom-width:0.04em;\"></span></span><span style=\"top:-3.677em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord mathnormal\">d</span><span class=\"mord\"><span class=\"mord mathnormal\">x</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.6644em;\"><span style=\"top:-3.063em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\" style=\"margin-right:0.03588em;\">v</span></span></span></span></span></span></span></span></span></span></span></span><span class=\"vlist-s\">​</span></span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.686em;\"><span></span></span></span></span></span><span class=\"mclose nulldelimiter\"></span></span><span class=\"mord\"><span class=\"mopen nulldelimiter\"></span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:1.3714em;\"><span style=\"top:-2.314em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord mathnormal\">d</span><span class=\"mord mathnormal\" style=\"margin-right:0.1132em;\">τ</span></span></span><span style=\"top:-3.23em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"frac-line\" style=\"border-bottom-width:0.04em;\"></span></span><span style=\"top:-3.677em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord mathnormal\">d</span><span class=\"mord\"><span class=\"mord mathnormal\">x</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.6644em;\"><span style=\"top:-3.063em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\">μ</span></span></span></span></span></span></span></span></span></span></span></span><span class=\"vlist-s\">​</span></span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.686em;\"><span></span></span></span></span></span><span class=\"mclose nulldelimiter\"></span></span><span class=\"mspace\" style=\"margin-right:0.2222em;\"></span><span class=\"mbin\">+</span><span class=\"mspace\" style=\"margin-right:0.2222em;\"></span><span class=\"mord\"><span class=\"mopen nulldelimiter\"></span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:1.3714em;\"><span style=\"top:-2.314em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord\" style=\"margin-right:0.05556em;\">∂</span><span class=\"mord\"><span class=\"mord mathnormal\">x</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.5904em;\"><span style=\"top:-2.989em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\">μ</span></span></span></span></span></span></span></span></span></span></span><span style=\"top:-3.23em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"frac-line\" style=\"border-bottom-width:0.04em;\"></span></span><span style=\"top:-3.677em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord\" style=\"margin-right:0.05556em;\">∂</span><span class=\"mord\"><span class=\"mord mathnormal\" style=\"margin-right:0.04601em;\">ξ</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.6644em;\"><span style=\"top:-3.063em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\" style=\"margin-right:0.0037em;\">α</span></span></span></span></span></span></span></span></span></span></span></span><span class=\"vlist-s\">​</span></span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.686em;\"><span></span></span></span></span></span><span class=\"mclose nulldelimiter\"></span></span><span class=\"mord\"><span class=\"mopen nulldelimiter\"></span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:1.4911em;\"><span style=\"top:-2.314em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord mathnormal\">d</span><span class=\"mord\"><span class=\"mord mathnormal\" style=\"margin-right:0.1132em;\">τ</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.7401em;\"><span style=\"top:-2.989em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mtight\">2</span></span></span></span></span></span></span></span></span></span></span><span style=\"top:-3.23em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"frac-line\" style=\"border-bottom-width:0.04em;\"></span></span><span style=\"top:-3.677em;\"><span class=\"pstrut\" style=\"height:3em;\"></span><span class=\"mord\"><span class=\"mord\"><span class=\"mord mathnormal\">d</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.8141em;\"><span style=\"top:-3.063em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mtight\">2</span></span></span></span></span></span></span></span></span><span class=\"mord\"><span class=\"mord mathnormal\">x</span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.6644em;\"><span style=\"top:-3.063em;margin-right:0.05em;\"><span class=\"pstrut\" style=\"height:2.7em;\"></span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\">μ</span></span></span></span></span></span></span></span></span></span></span></span><span class=\"vlist-s\">​</span></span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:0.686em;\"><span></span></span></span></span></span><span class=\"mclose nulldelimiter\"></span></span><span class=\"mspace\" style=\"margin-right:0.2778em;\"></span><span class=\"mrel\">=</span><span class=\"mspace\" style=\"margin-right:0.2778em;\"></span><span class=\"mord\">0</span></span></span></span><span class=\"vlist-s\">​</span></span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height:3.7091em;\"><span></span></span></span></span></span></span></span></span></span></span></span>",
            "key": "qirPOhenbC"
          }
        ],
        "key": "rSZVKCHeXl"
      }
    ],
    "key": "CK8OC5lkeI"
  },
  "references": {
    "cite": { "order": [], "data": {} },
    "footnotes": {
      "1": {
        "type": "footnoteDefinition",
        "identifier": "1",
        "label": "1",
        "children": [
          {
            "type": "paragraph",
            "children": [
              {
                "type": "text",
                "value": "This is a simple multiplication of cost times visitors!"
              }
            ]
          }
        ]
      }
    }
  }
}
