# maxframe.tensor.special.polygamma

### maxframe.tensor.special.polygamma(a, b, \*\*kwargs)

Polygamma functions.

Defined as $\psi^{(n)}(x)$ where $\psi$ is the
digamma function. See [[dlmf]](maxframe.tensor.special.rgamma.md#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`](maxframe.tensor.special.digamma.md#maxframe.tensor.special.digamma)

### References
