tf.math.igamma

Compute the lower regularized incomplete Gamma function P(a, x).

View aliases

Compat aliases for migration

See Migration guide for more details.

tf.compat.v1.igamma, tf.compat.v1.math.igamma

tf.math.igamma(
    a, x, name=None
)

The lower regularized incomplete Gamma function is defined as:

\(P(a, x) = gamma(a, x) / Gamma(a) = 1 - Q(a, x)\)

where

\(gamma(a, x) = \\int_{0}^{x} t^{a-1} exp(-t) dt\)

is the lower incomplete Gamma function.

Note, above Q(a, x) (Igammac) is the upper regularized complete Gamma function.

Args
a	A Tensor. Must be one of the following types: bfloat16, half, float32, float64.
x	A Tensor. Must have the same type as a.
name	A name for the operation (optional).

Returns
A Tensor. Has the same type as a.