- scipy.special.riccati_yn(n, x)¶
Compute Ricatti-Bessel function of the second kind and its derivative.
The Ricatti-Bessel function of the second kind is defined as \(x y_n(x)\), where \(y_n\) is the spherical Bessel function of the second kind of order \(n\).
This function computes the value and first derivative of the function for all orders up to and including n.
n : int
Maximum order of function to compute
x : float
Argument at which to evaluate
yn : ndarray
Value of y0(x), ..., yn(x)
ynp : ndarray
First derivative y0’(x), ..., yn’(x)
The computation is carried out via ascending recurrence, using the relation DLMF 10.51.1 [R451].
Wrapper for a Fortran routine created by Shanjie Zhang and Jianming Jin [R450].
[R450] (1, 2) Zhang, Shanjie and Jin, Jianming. “Computation of Special Functions”, John Wiley and Sons, 1996. http://jin.ece.illinois.edu/specfunc.html [R451] (1, 2) NIST Digital Library of Mathematical Functions. http://dlmf.nist.gov/10.51.E1