1CATAN(P)                   POSIX Programmer's Manual                  CATAN(P)
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NAME

6       catan, catanf, catanl - complex arc tangent functions
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SYNOPSIS

9       #include <complex.h>
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11       double complex catan(double complex z);
12       float complex catanf(float complex z);
13       long double complex catanl(long double complex z);
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DESCRIPTION

17       These functions shall compute the complex arc tangent of z, with branch
18       cuts outside the interval [-i, +i] along the imaginary axis.
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RETURN VALUE

21       These functions shall return the complex  arc  tangent  value,  in  the
22       range  of a strip mathematically unbounded along the imaginary axis and
23       in the interval [-pi/2, +pi/2] along the real axis.
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ERRORS

26       No errors are defined.
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28       The following sections are informative.
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EXAMPLES

31       None.
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APPLICATION USAGE

34       None.
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RATIONALE

37       None.
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FUTURE DIRECTIONS

40       None.
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SEE ALSO

43       ctan() , the Base Definitions  volume  of  IEEE Std 1003.1-2001,  <com‐
44       plex.h>
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47       Portions  of  this text are reprinted and reproduced in electronic form
48       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
49       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
50       Specifications Issue 6, Copyright (C) 2001-2003  by  the  Institute  of
51       Electrical  and  Electronics  Engineers, Inc and The Open Group. In the
52       event of any discrepancy between this version and the original IEEE and
53       The  Open Group Standard, the original IEEE and The Open Group Standard
54       is the referee document. The original Standard can be  obtained  online
55       at http://www.opengroup.org/unix/online.html .
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59IEEE/The Open Group                  2003                             CATAN(P)
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