BSD 4_4 release

[unix-history] / usr / src / lib / libm / common_source / j0.3

diff --git a/usr/src/lib/libm/common_source/j0.3 b/usr/src/lib/libm/common_source/j0.3
index 8030cb0..c0dc59b 100644 (file)
--- a/usr/src/lib/libm/common_source/j0.3
+++ b/usr/src/lib/libm/common_source/j0.3
@@ -1,42 +1,127 @@
-.\" Copyright (c) 1985 Regents of the University of California.
-.\" All rights reserved.  The Berkeley software License Agreement
-.\" specifies the terms and conditions for redistribution.
+.\" Copyright (c) 1985, 1991, 1993
+.\"    The Regents of the University of California.  All rights reserved.

 .\"
 .\"

-.\"    @(#)j0.3        6.6 (Berkeley) 5/12/86
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"    This product includes software developed by the University of
+.\"    California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.

 .\"
 .\"

-.TH J0 3M  "May 12, 1986"
-.UC 4
-.SH NAME
-j0, j1, jn, y0, y1, yn \- bessel functions
-.SH SYNOPSIS
-.nf
-.B #include <math.h>
-.PP
-.B double j0(x)
-.B double x;
-.PP
-.B double j1(x)
-.B double x;
-.PP
-.B double jn(n,x)
-.B int n;
-.B double x;
-.PP
-.B double y0(x)
-.B double x;
-.PP
-.B double y1(x)
-.B double x;
-.PP
-.B double yn(n,x)
-.B int n;
-.B double x;
-.fi
-.SH DESCRIPTION
-These functions calculate Bessel functions of the first
-and second kinds for real arguments and integer orders.
-.SH DIAGNOSTICS
-On a VAX, negative arguments cause y0, y1 and yn
-to return the reserved operand and set \fIerrno\fR to EDOM.
-.SH SEE ALSO
-math(3M), infnan(3M)
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)j0.3       8.1 (Berkeley) 6/4/93
+.\"
+.Dd June 4, 1993
+.Dt J0 3
+.Os BSD 4
+.Sh NAME
+.Nm j0 ,
+.Nm j1 ,
+.Nm jn ,
+.Nm y0 ,
+.Nm y1 ,
+.Nm yn
+.Nd bessel functions of first and second kind
+.Sh SYNOPSIS
+.Fd #include <math.h>
+.Ft double
+.Fn j0 "double x"
+.Ft double
+.Fn j1 "double x"
+.Ft double
+.Fn jn "int n" "double x"
+.Ft double
+.Fn y0 "double x"
+.Ft double
+.Fn y1 "double x"
+.Ft double
+.Fn yn "int n" "double x"
+.Sh DESCRIPTION
+The functions
+.Fn j0
+and
+.Fn j1
+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 function
+.Fn jn
+computes the
+.Em Bessel function of the first kind of the integer order
+.Fa n
+for the real value
+.Fa x .
+.Pp
+The functions
+.Fn y0
+and
+.Fn y1
+compute the linearly independent
+.Em Bessel function of the second kind of the order
+0 and the
+.Em order
+1, respectively,
+for the
+postive
+.Em integer
+value
+.Fa x
+(expressed as a double);
+the function
+.Fn yn
+computes the
+.Em Bessel function of the second kind for the integer order
+.Fa n
+for the postive 
+.Em integer
+value
+.Fa x
+(expressed as a double).
+.Sh RETURN VALUES
+If these functions are successful,
+the computed value is returned. On the
+.Tn VAX
+and
+.Tn Tahoe
+architectures,
+a negative
+.Fa x
+value
+results in an error; the global
+variable
+.Va errno
+is set to
+.Er EDOM
+and a reserve operand fault is generated.
+.Sh SEE ALSO
+.Xr math 3 ,
+.Xr infnan 3
+.Sh HISTORY
+A set of these functions
+function appeared in
+.At v7 .