1CATANH(3P)                 POSIX Programmer's Manual                CATANH(3P)
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PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
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NAME

12       catanh, catanhf, catanhl — complex arc hyperbolic tangent functions
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SYNOPSIS

15       #include <complex.h>
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17       double complex catanh(double complex z);
18       float complex catanhf(float complex z);
19       long double complex catanhl(long double complex z);
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DESCRIPTION

22       The functionality described on this reference page is aligned with  the
23       ISO C  standard.  Any  conflict between the requirements described here
24       and the ISO C standard is unintentional. This  volume  of  POSIX.1‐2017
25       defers to the ISO C standard.
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27       These  functions shall compute the complex arc hyperbolic tangent of z,
28       with branch cuts outside the interval [-1, +1] along the real axis.
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RETURN VALUE

31       These functions shall return the complex arc hyperbolic tangent  value,
32       in  the  range  of a strip mathematically unbounded along the real axis
33       and in the interval [-iπ/2, +iπ/2] along the imaginary axis.
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ERRORS

36       No errors are defined.
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38       The following sections are informative.
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EXAMPLES

41       None.
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APPLICATION USAGE

44       None.
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RATIONALE

47       None.
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FUTURE DIRECTIONS

50       None.
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SEE ALSO

53       ctanh()
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55       The Base Definitions volume of POSIX.1‐2017, <complex.h>
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58       Portions of this text are reprinted and reproduced in  electronic  form
59       from  IEEE Std 1003.1-2017, Standard for Information Technology -- Por‐
60       table Operating System Interface (POSIX), The Open Group Base  Specifi‐
61       cations  Issue  7, 2018 Edition, Copyright (C) 2018 by the Institute of
62       Electrical and Electronics Engineers, Inc and The Open Group.   In  the
63       event of any discrepancy between this version and the original IEEE and
64       The Open Group Standard, the original IEEE and The Open Group  Standard
65       is  the  referee document. The original Standard can be obtained online
66       at http://www.opengroup.org/unix/online.html .
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68       Any typographical or formatting errors that appear  in  this  page  are
69       most likely to have been introduced during the conversion of the source
70       files to man page format. To report such errors,  see  https://www.ker‐
71       nel.org/doc/man-pages/reporting_bugs.html .
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75IEEE/The Open Group                  2017                           CATANH(3P)
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