"NAVAL RESEARCH LAB WASHINGTON D C." . . "Computer programs." . . "Computer Programming and Software." . . "Special functions(mathematics)" . . . . . "Subroutines have been written in FORTRAN for the CDC 3600/3800 to evaluate Bessel functions of the first and second kinds for complex arguments. These routines will compute (J sub n)(x + iy) and (Y sub n)(x + iy), where x <or = 0, y> or = 0, and i = the square root of ( -1). Using the identity 2/(pi(x + iy)) = J sub(n+1)(x + iy)(Y sub n)(x + iy) - (J sub n)(x + iy)(Y sub(n+1)(x + 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)."@en . . . . . . . . . . . . . "FORTRAN Subroutines to Evaluate, in Single or Double Precision, Bessel Functions of the First and Second Kinds for Complex Arguments"@en . "Fortran subroutines to evaluate, in single or double precision, Bessel functions of the first and second kinds for complex arguments"@en . . . . . . . . . "NTIS AD A024 384"@en . . . "Fortran subroutines to evaluate, in single or double precision, Bessel Functions of the first and second kinds for complex arguments"@en . . . "Computations." . . "Bessel functions." . . "Fortran." . . "Acoustics." . . "Acoustic scattering." . .