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)