4.4BSD/usr/src/share/man/man3f/bessel.3

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.\" Copyright (c) 1983, 1993
.\"	The Regents of the University of California.  All rights reserved.
.\"
.\" This module is believed to contain source code proprietary to AT&T.
.\" Use and redistribution is subject to the Berkeley Software License
.\" Agreement and your Software Agreement with AT&T (Western Electric).
.\"
.\"	@(#)bessel.3	8.1 (Berkeley) 6/5/93
.\"
.TH BESSEL 3F "June 5, 1993"
.UC 5
.SH NAME
bessel functions \- of two kinds for integer orders
.SH SYNOPSIS
.B function besj0 (x)
.sp 1
.B function besj1 (x)
.sp 1
.B function besjn (n, x)
.sp 1
.B function besy0 (x)
.sp 1
.B function besy1 (x)
.sp 1
.B function besyn (n, x)
.sp 1
.B double precision function dbesj0 (x)
.br
.B double precision x
.sp 1
.B double precision function dbesj1 (x)
.br
.B double precision x
.sp 1
.B double precision function dbesjn (n, x)
.br
.B double precision x
.sp 1
.B double precision function dbesy0 (x)
.br
.B double precision x
.sp 1
.B double precision function dbesy1 (x)
.br
.B double precision x
.sp 1
.B double precision function dbesyn (n, x)
.br
.B double precision x
.SH DESCRIPTION
These functions calculate Bessel functions of the first and second kinds
for real arguments and integer orders.
.SH DIAGNOSTICS
Negative arguments cause \fIbesy0, besy1,\fR and \fIbesyn\fR to return a huge
negative value. The system error code will be set to EDOM (33).
.SH FILES
.ie \nM /usr/ucb/lib/libF77.a
.el /usr/lib/libF77.a
.SH "SEE ALSO"
j0(3M), perror(3F)