SciPy

scipy.special.pbwa

scipy.special.pbwa(a, x) = <ufunc 'pbwa'>

Parabolic cylinder function W.

The function is a particular solution to the differential equation

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

for a full definition see section 12.14 in [R512].

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 [R513]. The implementation is accurate only for |a|, |x| < 5 and returns NaN outside that range.

References

[R512](1, 2) Digital Library of Mathematical Functions, 14.30. http://dlmf.nist.gov/14.30
[R513](1, 2) Zhang, Shanjie and Jin, Jianming. “Computation of Special Functions”, John Wiley and Sons, 1996. http://jin.ece.illinois.edu/specfunc.html

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