FORTRAN Subroutines to Evaluate, in Single or Double Precision, Bessel Functions of the First and Second Kinds for Complex Arguments.

Subroutines have been written in FORTRAN for the CDC 36003800 to evaluate Bessel functions of the first and second kinds for complex arguments. These routines will compute J sub nx iy and Y sub nx iy, where x or 0, y or 0, and i the square root of -1. Using the identity 2pix iy J subn1x iyY sub nx iy - J sub nx iyY subn1x iy as a check, the single-precision version will generate results that are accurate to eight figures or more for arguments equal to plus or minus 20.0 plus or minus 20.0i and the double-precision version will generate results that are accurate for seven figures or more for arguments equal to plus or minus 100.0 plus or minus 20.0i.