2 .\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
3 .TH "CATAN" 3P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
6 catan, catanf \- complex arc tangent functions
9 \fB#include <complex.h>
12 double complex catan(double complex\fP \fIz\fP\fB);
14 float complex catanf(float complex\fP \fIz\fP\fB);
19 These functions compute the complex arc tangent of \fIz\fP,
20 with branch cuts outside the interval
21 [-\fIi\fP,\ +\fIi\fP] along the imaginary axis.
24 These functions return the complex arc tangent value, in the
25 range of a strip mathematically unbounded along the imaginary
26 axis and in the interval [-pi/2,\ +pi/2] along the
30 No errors are defined.
32 \fIThe following sections are informative.\fP
47 \fIctan\fP(), the Base Definitions volume of IEEE\ Std\ 1003.1-2001,
50 Portions of this text are reprinted and reproduced in electronic form
51 from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
52 -- Portable Operating System Interface (POSIX), The Open Group Base
53 Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
54 Electrical and Electronics Engineers, Inc and The Open Group. In the
55 event of any discrepancy between this version and the original IEEE and
56 The Open Group Standard, the original IEEE and The Open Group Standard
57 is the referee document. The original Standard can be obtained online at
58 http://www.opengroup.org/unix/online.html .