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

cbesj() void cbesj ( doublecomplex  z, double  nu, int  kode, int  n, doublecomplex  y[], int *  info  ) Sequence of Bessel functions of the first kind Jν(z) (fractional order) (complex argument) Purpose cbesj computes the sequence of the Bessel functions of the first kind Jν(z) for complex argument z and real nonnegative orders ν, ν+1, ... A scaling option is available to help avoid overflow. Parameters [in] z Argument z. [in] nu Order of first member of the sequence. (nu >= 0) [in] kode A parameter to indicate the scaling option. = 1: No scaling. = 2: Returns exponentially scaled values. [in] n Number of members in the sequence. (n members of orders nu to nu+n-1 to be computed) (n >= 1) [out] y[] Array y[ly] (ly >= n) Sequence of the Bessel functions of the first kind. kode = 1: Jν(z) (ν = nu to nu+n-1) kode = 2: exp(abs(im(z)))*Jν(z) (ν = nu to nu+n-1) [out] info = 0: Successful exit. = -2: The argument nu had an illegal value. (nu < 0) = -3: The argument kode had an illegal value. (kode != 1 and kode != 2) = -4: The argument n had an illegal value. (n < 1) = nz (0 < nz <= n): The last nz components of y[] set to zero due to underflow. = n+1: Precision warning. (Half precision or less because abs(z) or nu+n-1 is large) = n+2: Precision error. (No precision because abs(z) or nu+n-1 is too large) = n+3: Overflow im(z) too large on kode = 1. = n+4: Algorithmic error. (Termination condition not met) Reference SLATEC