J0(3) Linux Programmers Manual J0(3)
NAME
j0, j0f, j0l, j1, j1f, j1l, jn, jnf, jnl, y0, y0f, y0l, y1, y1f, y1l,
yn, ynf, ynl  Bessel functions
SYNOPSIS
#include
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);
float j0f(float x);
float j1f(float x);
float jnf(int n, float x);
float y0f(float x);
float y1f(float x);
float ynf(int n, float x);
long double j0l(long double x);
long double j1l(long double x);
long double jnl(int n, long double x);
long double y0l(long double x);
long double y1l(long double x);
long double ynl(int n, long double x);
Link with lm.
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
For all of these functions: _SVID_SOURCE  _BSD_SOURCE 
_XOPEN_SOURCE
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.
The j0f() etc. and j0l() etc. functions are versions that take and
return float and long double values, respectively.
CONFORMING TO
The functions returning double conform to SVr4, 4.3BSD, POSIX.12001.
BUGS
There are errors of up to 2e16 in the values returned by j0(), j1()
and jn() for values of x between 8 and 8.
COLOPHON
This page is part of release 3.05 of the Linux manpages project. A
description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/manpages/.
20070726 J0(3)
