unixdev.net


Switch to SpeakEasy.net DSL

The Modular Manual Browser

Home Page
Manual: (NetBSD-6.1.5)
Page:
Section:
Apropos / Subsearch:
optional field

J0(3)                      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 <&lt;math.h>&gt;

     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 the order 0 and the order 1, respectively, 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 the order 0 and the
     order 1, respectively, for the positive integer value x (expressed as a
     double); the functions yn() and ynf() compute the Bessel function of the
     second kind for the integer order n for the positive integer value x
     (expressed as a double).

RETURN VALUES
     If these functions are successful, the computed value is returned,
     otherwise the global variable errno is set to EDOM and a reserve operand
     fault is generated.

SEE ALSO
     math(3)

HISTORY
     This set of functions appeared in Version 7 AT&T UNIX.

NetBSD 6.1.5                    April 19, 1991                    NetBSD 6.1.5