besi0 besi1 besinu besk0 besk1 besknu

besinu() function besinu ( nu::Real  , x::Real    ) Modified Bessel function of the first kind of order ν Iν(x) (fractional order) Purpose besinu computes the modified Bessel function of the first kind of order ν Iν(x). Returns Float64 Modified Bessel function of the first kind of order ν Iν(x). Parameters [in] nu Order ν. [in] x Argument x. (x >= 0 if ν is not an integer) Error handling If x < 0 when nu is not an integer, domain error (EDOM) is occurs Range error (ERANGE) may occur. Reference boost/math/special_functions