besi0 besi0e besi1 besi1e besin besind besinu besinud besk0 besk0e besk1 besk1e beskn besknd besknu besknud cbesi cbesk sbesin sbesinu sbeskn sbesknu

besi0() double besi0 ( double  x ) Modified Bessel functions of the first kind of order zero I0(x) Purpose besi0 computes the modified Bessel function of the first kind of order zero I0(x). Returns Modified Bessel functions of the first kind of order zero I0(x). Parameters [in] x Argument x. Error handling Range error (ERANGE) may occur. Reference boost/math/special_functions