NAME
y0(), y0f(), y1(), y1f(), yn(), ynf() — Bessel functions of the second kind
SYNOPSIS
#include <math.h>
double y0(double x);
double y1(double x);
double yn(int n, double x);
HP Integrity Server Only
float y0f(float x);
float y1f(float x);
float ynf(int n, float x);
DESCRIPTION
y0()
and
y1()
return Bessel functions of
x
of the second kind of orders 0 and 1
respectively.
yn()
returns the Bessel function of
x
of the second kind of order
n.
y0f(),
y1f(),
and
ynf()
are
float
versions of
y0(),
y1(),
snd
yn();
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 negative or zero,
y0(),
y1(),
and
yn()
return
-HUGE_VAL
(equal to -INFINITY)
If
x
is NaN,
y0(),
y1(),
and
yn()
return NaN.
If the correct result would overflow,
y0(),
y1(),
and
yn()
return
-HUGE_VAL.
ERRORS
No errors are defined.
SEE ALSO
j0(3M),
math(5).
Handbook of Mathematical Functions,
M. Abramowitz and I. Stegun,
(New York: Dover Publications, 1972).
STANDARDS CONFORMANCE
y0(): SVID3, XPG4.2
y1(): SVID3, XPG4.2
yn(): SVID3, XPG4.2
Printable version
