Linux 2.6 - man page for catanf (linux section 3posix)
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CATAN(P) POSIX Programmer's Manual CATAN(P)
catan, catanf, catanl - complex arc tangent functions
double complex catan(double complex z);
float complex catanf(float complex z);
long double complex catanl(long double complex z);
These functions shall compute the complex arc tangent of z, with branch cuts outside the
interval [-i, +i] along the imaginary axis.
These functions shall return the complex arc tangent value, in the range of a strip mathe-
matically unbounded along the imaginary axis and in the interval [-pi/2, +pi/2] along the
No errors are defined.
The following sections are informative.
ctan() , the Base Definitions volume of IEEE Std 1003.1-2001, <complex.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE Std
1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System
Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by
the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and The Open Group
Standard, the original IEEE and The Open Group Standard is the referee document. The orig-
inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 CATAN(P)
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