J0(3) BSD Library Functions Manual J0(3)

NAME
     jj00, jj11, jjnn, yy00, yy11, yynn - bessel functions of first and second kind

SYNOPSIS
     ##iinncclluuddee <>

     double
     jj00(double x);

     double
     jj11(double x);

     double
     jjnn(int n, double x);

     double
     yy00(double x);

     double
     yy11(double x);

     double
     yynn(int n, double x);

DESCRIPTION
     The functions jj00(x) and jj11(x) compute the Bessel function of the first
     kind of the order 0 and the order 1, respectively; the function jjnn(n, x)
     computes the Bessel function of the first kind of the integer order n.

     The functions yy00(x) and yy11(x) compute the linearly independent Bessel
     function of the second kind of the order 0 and the order 1, respectively,
     for the positive integer value x (expressed as a double); the function
     yynn(n, x) computes the Bessel function of the second kind for the integer
     order n for the positive integer value x (expressed as a double).

SSPPEECCIIAALL VVAALLUUEESS
     jj00(0) returns 1.

     jj00(+-infinity) returns 0.

     jj00(NaN) returns a NaN.

     jj11(0) returns 0.

     jj11(+infinity) returns 0.

     jj11(NaN) returns a NaN.

     yy00(0) , yy11(0) , and yynn(n, 0) all return -infinity and raise the "divi-
     sion-by-zero" floating-point flag.

4th Berkeley Distribution        July 24, 2003       4th Berkeley Distribution