26 Numerics library [numerics]

26.9 Mathematical functions for floating-point types [c.math]

26.9.5 Mathematical special functions [sf.cmath]

26.9.5.21 Spherical Neumann functions [sf.cmath.sph_neumann]

double sph_neumann(unsigned n, double x); float sph_neumannf(unsigned n, float x); long double sph_neumannl(unsigned n, long double x);

1

Effects: These functions compute the spherical Neumann functions, also known as the spherical Bessel functions of the second kind, of their respective arguments n and x.

2

Returns: nn(x) = (π/2x)1/2 Nn + 1/2(x),    for x ≥ 0 where n is n and x is x.

3

Remarks: The effect of calling each of these functions is implementation-defined if n >= 128.