NAME
j0(), j0f(), j1(), j1f(), jn(), jnf() — Bessel functions of the first kind
SYNOPSIS
#include <math.h>
double j0(double x);
double j1(double x);
double jn(int n, double x);
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float j0f(float x);
float j1f(float x);
float jnf(int n, float x);
DESCRIPTION
j0()
and
j1()
return Bessel functions of
x
of the first kind of orders 0 and 1
respectively.
jn()
returns the Bessel function of
x
of the first kind of order
n.
j0f(),
j1f(),
and
jnf()
are
float
versions of
j0(),
j1(),
snd
jn();
each takes a
float
argument
x
and returns a
float
result.
USAGE
To use these functions, compile either with the default
-Ae
option or with the
-Aa
and
-D_HPUX_SOURCE
options. Make sure your program includes
<math.h>.
Link in the math library by specifying
-lm
on the compiler or linker command line.
RETURN VALUE
If
x
is NaN,
j0(),
j1(),
and
jn()
return NaN.
ERRORS
No errors are defined.
SEE ALSO
y0(3M),
math(5).
M. Abramowitz and I. Stegun,
Handbook of Mathematical Functions
(New York: Dover Publications, 1972).
STANDARDS CONFORMANCE
j0(): SVID3, XPG4.2
j1(): SVID3, XPG4.2
jn(): SVID3, XPG4.2
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