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freebsd/lib/msun/man/j0.3
David Schultz 8e26469445 Remove numerous references to VAX floating-point and the setting of
errno, replacing them with a discussion of IEEE exceptions where
appropriate.  Cross-reference fenv(3) whenever exceptions are
mentioned.
2005-01-14 23:28:28 +00:00

143 lines
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.\" Copyright (c) 1985, 1991 Regents of the University of California.
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.\" This product includes software developed by the University of
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.\" from: @(#)j0.3 6.7 (Berkeley) 4/19/91
.\" $FreeBSD$
.\"
.Dd January 14, 2005
.Dt J0 3
.Os
.Sh NAME
.Nm j0 ,
.Nm j0f ,
.Nm j1 ,
.Nm j1f ,
.Nm jn ,
.Nm jnf ,
.Nm y0 ,
.Nm y0f ,
.Nm y1 ,
.Nm y1f ,
.Nm yn ,
.Nm ynf
.Nd Bessel functions of first and second kind
.Sh LIBRARY
.Lb libm
.Sh SYNOPSIS
.In math.h
.Ft double
.Fn j0 "double x"
.Ft float
.Fn j0f "float x"
.Ft double
.Fn j1 "double x"
.Ft float
.Fn j1f "float x"
.Ft double
.Fn jn "int n" "double x"
.Ft float
.Fn jnf "int n" "float x"
.Ft double
.Fn y0 "double x"
.Ft float
.Fn y0f "float x"
.Ft double
.Fn y1 "double x"
.Ft float
.Fn y1f "float x"
.Ft double
.Fn yn "int n" "double x"
.Ft float
.Fn ynf "int n" "float x"
.Sh DESCRIPTION
The functions
.Fn j0 ,
.Fn j0f ,
.Fn j1
and
.Fn j1f
compute the
.Em Bessel function of the first kind of the order
0 and the
.Em order
1, respectively,
for the
real value
.Fa x ;
the functions
.Fn jn
and
.Fn jnf
compute the
.Em Bessel function of the first kind of the integer
.Em order
.Fa n
for the real value
.Fa x .
.Pp
The functions
.Fn y0 ,
.Fn y0f ,
.Fn y1 ,
and
.Fn y1f
compute the linearly independent
.Em Bessel function of the second kind of the order
0 and the
.Em order
1, respectively,
for the
positive
.Em real
value
.Fa x ;
the functions
.Fn yn
and
.Fn ynf
compute the
.Em Bessel function of the second kind for the integer
.Em order
.Fa n
for the positive
.Em real
value
.Fa x .
.Sh RETURN VALUES
If these functions are successful,
the computed value is returned.
.Sh SEE ALSO
.Xr math 3
.Sh HISTORY
This set of functions
appeared in
.At v7 .