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



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.