# GAMMA_LANCZOS_G > Arbitrary constant `g` to be used in Lanczos approximation functions.

## Usage ```javascript var GAMMA_LANCZOS_G = require( '@stdlib/constants/float64/gamma-lanczos-g' ); ``` #### GAMMA_LANCZOS_G Arbitrary constant `g` to be used in [Lanczos approximation][lanczos-approximation] functions. ```javascript var bool = ( GAMMA_LANCZOS_G === 10.900511 ); // returns true ```

## Examples ```javascript var GAMMA_LANCZOS_G = require( '@stdlib/constants/float64/gamma-lanczos-g' ); console.log( GAMMA_LANCZOS_G ); // => 10.900511 ```

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## C APIs

### Usage ```c #include "stdlib/constants/float64/gamma_lanczos_g.h" ``` #### STDLIB_CONSTANT_FLOAT64_GAMMA_LANCZOS_G Macro for the arbitrary constant `g` to be used in [Lanczos approximation][lanczos-approximation] functions.

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## References - Pugh, Glendon R. 2004. "An analysis of the Lanczos gamma approximation." PhD thesis, University of British Columbia. [<https://web.viu.ca/pughg/phdThesis/phdThesis.pdf>][@pugh:2004a].

[lanczos-approximation]: https://en.wikipedia.org/wiki/Lanczos_approximation [@pugh:2004a]: https://web.viu.ca/pughg/phdThesis/phdThesis.pdf