NAME

       j0, j1, jn, y0, y1, yn - Bessel functions

SYNOPSIS

       #include <math.h>

       double j0(double x);

       double j1(double x);

       double jn(int n, double x);

       double y0(double x);

       double y1(double x);

       double yn(int n, double x);

DESCRIPTION

       The  j0()  and  j1()  functions  return  Bessel  functions  of  x  of  the  first kind of orders 0 and 1,
       respectively.  The jn() function returns the Bessel function of x of the first kind of order n.

       The y0() and y1() functions return Bessel functions  of  x  of  the  second  kind  of  orders  0  and  1,
       respectively.  The yn() function returns the Bessel function of x of the second kind of order n.

       For  the functions y0(), y1() and yn(), the value of x must be positive.  For negative values of x, these
       functions return -HUGE_VAL.

CONFORMING TO

       SVID 3, BSD 4.3

BUGS

       There are errors of up to 2e-16 in the values returned by j0(), j1() and jn() for values of x between  -8
       and 8.

                                                  June 26, 1993                                            J0(3)