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.