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J0(3) FreeBSD Library Functions Manual J0(3)
NAME
j0, j0f, j1, j1f, jn, jnf, y0, y0f, y1, y1f, yn, ynf - Bessel functions
of first and second kind
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
#include <math.h>
double
j0(double x);
float
j0f(float x);
double
j1(double x);
float
j1f(float x);
double
jn(int n, double x);
float
jnf(int n, float x);
double
y0(double x);
float
y0f(float x);
double
y1(double x);
float
y1f(float x);
double
yn(int n, double x);
float
ynf(int n, float x);
DESCRIPTION
The functions j0(), j0f(), j1(), and j1f() compute the Bessel function of
the first kind of orders 0 and 1 for the real value x; the functions jn()
and jnf() compute the Bessel function of the first kind of the integer
order n for the real value x.
The functions y0(), y0f(), y1(), and y1f() compute the linearly
independent Bessel function of the second kind of orders 0 and 1 for the
positive real value x; the functions yn() and ynf() compute the Bessel
function of the second kind for the integer order n for the positive real
value x.
exception and return NaN. If x is +-0, these routines will generate a
divide-by-zero exception and return -infinity. If x is a sufficiently
small positive number, then y1(), y1f(), yn(), and ynf() will generate an
overflow exception and return -infinity.
SEE ALSO
math(3)
STANDARDS
The j0(), j1(), jn(), y0(), y1(), and yn() functions conform to IEEE Std
1003.1-2001 ("POSIX.1"). The float versions are extensions.
HISTORY
This set of functions appeared in Version 7 AT&T UNIX.
FreeBSD 14.0-RELEASE-p11 March 10, 2015 FreeBSD 14.0-RELEASE-p11