mars.tensor.special.polygamma#

mars.tensor.special.polygamma(a, b, **kwargs)[source]#

Polygamma functions.

Defined as \(\psi^{(n)}(x)\) where \(\psi\) is the digamma function. See [dlmf] for details.

Parameters

  • n (array_like) – The order of the derivative of the digamma function; must be integral

  • x (array_like) – Real valued input

Returns

Function results

Return type

ndarray

See also

digamma

References

dlmf

NIST, Digital Library of Mathematical Functions, https://dlmf.nist.gov/5.15