besj0 besj1 besjn besjnd besjnu besjnud besy0 besy1 besyn besynd besynu besynud cbesh cbesj cbesy sbesjn sbesjnu sbesyn sbesynu

besj1() double besj1 ( double  x ) Bessel functions of the first kind of order one J1(x) Purpose besjnu computes the Bessel function of the first kind of order one J1(x). Returns Bessel functions of the first kind of order one J1(x). Parameters [in] x Argument x. Error handling Range error (ERANGE) may occur. Reference boost/math/special_functions