NAME

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

SYNOPSIS

#include <math.h>

long float j0 (x)
long float x;

long float j1 (x)
long float x;

long float jn (n, x)
int n;
long float x;

long float y0 (x)
long float x;

long float y1 (x)
long float x;

long float yn (n, x)
int n;
long float x;

DESCRIPTION

J0 and j1 return Bessel functions of x of the first kind of orders 0 and 1 respectively.  Jn returns the Bessel function of x of the first kind of order n.

Y0 and y1 return the Bessel functions of x of the second kind of orders 0 and 1 respectively.  Yn returns the Bessel function of x of the second kind of order n. The value of x must be positive. 

DIAGNOSTICS

The routines comprising bessel use the standard IRIS floating point exception handling system.  Certain arguments to y0,y1,yn,j0,j1, and jn raise a floating point exception with the operation set to MATH and the global _mathfunc_id indicating the routine raising the exception.  The exception type (the type field of the global _fperror structure) is set as indicated below:

SEE ALSO

fpsigset(3C), IRIS Floating Point, IRIS Workstation Guide. 

Version 2.5r1  —  October 29, 1986