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

besi0e() double besi0e ( double  x ) Modified Bessel functions of the first kind of order zero I0(x) (exponentially scaled) Purpose besi0e computes the exponentially scaled modified Bessel function of the first kind of order zero exp(-|x|)*I0(x). Returns Exponentially scaled modified Bessel functions of the first kind of order zero exp(-|x|)*I0(x). Parameters [in] x Argument x. Error handling Range error (ERANGE) may occur. Reference netlib/cephes