tf.math.igammac  |  TensorFlow v2.0.0 (original) (raw)

tf.math.igammac

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Compute the upper regularized incomplete Gamma function Q(a, x).

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Compat aliases for migration

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tf.compat.v1.igammac, tf.compat.v1.math.igammac

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

The upper regularized incomplete Gamma function is defined as:

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

where

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

is the upper incomplete Gama function.

Note, above P(a, x) (Igamma) is the lower regularized complete Gamma function.