j0l man page on YellowDog

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J0(3)			   Linux Programmer's 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
       #define _GNU_SOURCE
       #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);

       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.

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.1-2001.

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.

				  2002-08-25				 J0(3)
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