jax.scipy.special.gammainc
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jax.scipy.special.gammainc¶
- jax.scipy.special.gammainc(a, x)[source]¶
Regularized lower incomplete gamma function.
LAX-backend implementation of
gammainc().Original docstring below.
It is defined as
\[P(a, x) = \frac{1}{\Gamma(a)} \int_0^x t^{a - 1}e^{-t} dt\]for \(a > 0\) and \(x \geq 0\). See [dlmf] for details.
- Parameters
a (array_like) – Positive parameter
x (array_like) – Nonnegative argument
- Returns
Values of the lower incomplete gamma function
- Return type
scalar or ndarray
References
- dlmf
NIST Digital Library of Mathematical functions https://dlmf.nist.gov/8.2#E4
- boost
Maddock et. al., “Incomplete Gamma Functions”, https://www.boost.org/doc/libs/1_61_0/libs/math/doc/html/math_toolkit/sf_gamma/igamma.html