jn(3M)

NAME | SYNOPSIS | API RESTRICTIONS | DESCRIPTION | RETURN VALUES | ATTRIBUTES | SEE ALSO

NAME

j0, j1, jn, y0, y1, yn- Bessel functions of the first and second kind

SYNOPSIS

$(NUCLEUS_DIR)/lib/libm.a
#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);

API RESTRICTIONS

The function or functions documented here may not be used safely in all application contexts with all APIs provided in the ChorusOS 5.0 product.

See API(5FEA) for details.

DESCRIPTION

The j0() and j1() functions compute the Bessel function of the first type of the order 0 and the order 1, respectively, for the real value x . The jn() function computes the Bessel function of the first type of the integer order n for the real value x .

The functions y0() and y1() compute the linearly independent Bessel function of the second type of the order 0 and the order 1, respectively, for the positive real value x . The function yn() computes the Bessel function of the second type for the integer order n for the positive real value x .

RETURN VALUES

If these functions are successful, the computed value is returned. Upon successful completion, j0() , j1() , and jn() return the relevant Bessel value of x of the first type.

On successful completion, y0() , y1() , and yn() return the relevant Bessel value of x of the second type.

If the x argument of y0() , y1() , or yn() is negative, -HUGE_VAL is returned and errno is set to EDOM .

If x is 0.0, -HUGE_VAL is returned and errno is set to ERANGE .

If the correct result would cause overflow, -HUGE_VAL or HUGE_VAL is returned and errno is set to ERANGE .

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Interface Stability	Evolving

SEE ALSO

Intro(3M) , infnan(3M)

ChorusOS 5.0  Last Revised December 2001

NAME | SYNOPSIS | API RESTRICTIONS | DESCRIPTION | RETURN VALUES | ATTRIBUTES | SEE ALSO