Participer au site avec un Tip
Rechercher
 

Améliorations / Corrections

Vous avez des améliorations (ou des corrections) à proposer pour ce document : je vous remerçie par avance de m'en faire part, cela m'aide à améliorer le site.

Emplacement :

Description des améliorations :

Module « scipy.special »

Fonction pbwa - module scipy.special

Signature de la fonction pbwa

Description

pbwa.__doc__

pbwa(x1, x2[, out1, out2], / [, out=(None, None)], *, where=True, casting='same_kind', order='K', dtype=None, subok=True[, signature, extobj])

pbwa(a, x)

Parabolic cylinder function W.

The function is a particular solution to the differential equation

.. math::

    y'' + \left(\frac{1}{4}x^2 - a\right)y = 0,

for a full definition see section 12.14 in [1]_.

Parameters
----------
a : array_like
    Real parameter
x : array_like
    Real argument

Returns
-------
w : scalar or ndarray
    Value of the function
wp : scalar or ndarray
    Value of the derivative in x

Notes
-----
The function is a wrapper for a Fortran routine by Zhang and Jin
[2]_. The implementation is accurate only for ``|a|, |x| < 5`` and
returns NaN outside that range.

References
----------
.. [1] Digital Library of Mathematical Functions, 14.30.
       https://dlmf.nist.gov/14.30
.. [2] Zhang, Shanjie and Jin, Jianming. "Computation of Special
       Functions", John Wiley and Sons, 1996.
       https://people.sc.fsu.edu/~jburkardt/f_src/special_functions/special_functions.html