tf.math.igammac

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

tf.math.igammac(
    a: Annotated[Any, tf.raw_ops.Any],
    x: Annotated[Any, tf.raw_ops.Any],
    name=None
) -> Annotated[Any, tf.raw_ops.Any]

Used in the notebooks

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 Gamma function.

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