/**
 * Inverse complementary error function.
 *
 * Computes the inverse of the complementary error function.
 *
 * It satisfies `y = erfc(x)` for `0 ≤ y ≤ 2` with `-∞ ≤ x ≤ ∞`.
 *
 * @param y A real value in the range [2, 0]
 * @returns The value of the inverse complementary error function
 * @throws If the input is out of range
 *
 * @example Compute the inverse complementary error function for a value less than 1
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(erfcinv(1.5), -0.476936236121904);
 *
 * ```
 *
 * @example Compute the inverse complementary error function for a value greater than 1
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(erfcinv(0.5), 0.476936236121904);
 *
 * ```
 *
 * @example Compute the inverse complementary error function for 1
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(erfcinv(1), 0);
 *
 * ```
 *
 * @example Compute the inverse complementary error function for 2 (should return negative infinity)
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(erfcinv(2), -Infinity);
 *
 * ```
 *
 * @example Compute the inverse complementary error function for 0 (should return positive infinity)
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(erfcinv(0), Infinity);
 *
 * ```
 */
export default function erfcinv(y: number): number;
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