special-function

Double-Double Arithmetic and Special Function Implements

Pure Python functions

real-valued gamma function in quad-precision using classic Fortran77

Incomplete beta function.

Polygamma function.

Round a double-precision floating-point number toward zero.

Calculate a scaled Lanczos sum for the approximation of the gamma function.

Incomplete beta function and its first derivative.

Trigamma function.

Inverse incomplete gamma function.

Natural logarithm of the beta function.

Create an iterator which evaluates the natural logarithm of 1-exp(-|x|) for each iterated value.

Inverse incomplete beta function.

Create an iterator which evaluates the binary logarithm for each iterated value.

Calculate the Lanczos sum for the approximation of the gamma function.

Create an iterator which evaluates the natural logarithm of 1+x for each iterated value.

Compute the rising factorial.

Inverse incomplete beta function.

Create an iterator which evaluates the natural logarithm of the beta function.

Round a single-precision floating-point number toward zero.