J0(3) | Linux Programmer's Manual | J0(3) |
NAME
j0, j0f, j0l, j1, j1f, j1l, jn, jnf, jnl - Bessel functions of the first kindSYNOPSIS
#include<math.h>
double j0(double x );
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
_SVID_SOURCE || _BSD_SOURCE || _XOPEN_SOURCE
_SVID_SOURCE || _BSD_SOURCE || _XOPEN_SOURCE >= 600
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 j0f() etc. and j0l() etc. functions are versions that take and return float and long double values, respectively.
RETURN VALUE
On success, these functions return the appropriate Bessel value of the first kind for x.ERRORS
See math_error(7) for information on how to determine whether an error has occurred when calling these functions.The following errors can occur:
- Range error: result underflow, or x is too large in magnitude
- errno is set to ERANGE.
These functions do not raise exceptions for fetestexcept(3).
CONFORMING TO
The functions returning double conform to SVr4, 4.3BSD, POSIX.1-2001. The others are nonstandard functions that also exist on the BSDs.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.SEE ALSO
y0(3)COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.2010-09-20 |