$home/manuals/unix_v7/3/j0

J0(3M)                                                                  J0(3M)



NAME
       j0, j1, jn, y0, y1, yn - bessel functions

SYNOPSIS
       #include <math.h>

       double j0(x)
       double x;

       double j1(x)
       double x;

       double jn(n, x);
       double x;

       double y0(x)
       double x;

       double y1(x)
       double x;

       double yn(n, x)
       double x;

DESCRIPTION
       These  functions  calculate  Bessel  functions  of the first and second
       kinds for real arguments and integer orders.

DIAGNOSTICS
       Negative arguments cause y0, y1, and yn to return a huge negative value
       and set errno to EDOM.



                                                                        J0(3M)