.po 1i
.TH J0 3M Bell
.V 08/15/84 17:21:24
.\" @[$]j0.3	1.7	08/15/84 17:21:24 - Zilog Inc.
.ad
.fi
.SH NAME
j0, j1, jn, y0, y1, yn \- bessel functions
.SH SYNOPSIS
.nf
\fB#include <math.h>
.PP
\fBdouble j0\fI(x)
\fB     double \fIx;
.PP
\fBdouble j1\fI(x)
\fB     double\fI x;
.PP
\fBdouble jn\fI(n, x)
\fB     double\fI x;
.PP
\fBdouble y0\fI(x)
\fB     double\fI x;
.PP
\fBdouble y1\fI(x)
\fB     double\fI x;
.PP
\fBdouble yn\fI(n, x)
\fB     double\fI x;\fR
.fi
.SH DESCRIPTION
These functions calculate Bessel functions of the first
and second kinds for real arguments and integer orders.
.SH DIAGNOSTICS
Negative arguments cause
.B y0, y1,
and
.B yn
to return a huge negative value
and set
.I errno
to EDOM.