26 Numerics library [numerics]

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

26.8.6 Mathematical special functions [sf.cmath]

26.8.6.21 Spherical Neumann functions [sf.cmath.sph.neumann]

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double sph_neumann(unsigned n, double x); float sph_neumannf(unsigned n, float x); long double sph_neumannl(unsigned n, long double x);
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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.
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Returns:
where n is n and x is x.
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Remarks: The effect of calling each of these functions is implementation-defined if n >= 128.
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