j0 man page on OpenBSD

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J0(3)			  OpenBSD Programmer's Manual			 J0(3)

NAME
     j0, j0f, j1, j1f, jn, jnf, y0, y0f, y1, y1f, yn, ynf - Bessel functions
     of first and second kind

SYNOPSIS
     #include <math.h>

     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() and j1() compute the Bessel function of the first kind
     of the order 0 and the order 1, respectively, for the real value x; the
     function jn() computes the Bessel function of the first kind of the
     integer order n for the real value x.  The functions j0f(), j1f(), and
     jnf() are single precision versions of j0(), j1(), and jn(),
     respectively.

     The functions y0() and y1() 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 function
     yn() computes the Bessel function of the second kind for the integer
     order n for the positive integer value x (expressed as a double).	The
     functions y0f(), y1f(), and ynf() are single precision versions of y0(),
     y1(), and yn(), respectively.

RETURN VALUES
     If these functions are successful, the computed value is returned,
     otherwise the global variable errno is set to EDOM or ERANGE.

SEE ALSO
     math(3)

HISTORY
     This set of functions appeared in Version 7 AT&T UNIX.

OpenBSD 4.9			 May 31, 2007			   OpenBSD 4.9
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