1CLOG(3P) POSIX Programmer's Manual CLOG(3P)
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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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12 clog, clogf, clogl - complex natural logarithm functions
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15 #include <complex.h>
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17 double complex clog(double complex z);
18 float complex clogf(float complex z);
19 long double complex clogl(long double complex z);
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23 These functions shall compute the complex natural (base e) logarithm of
24 z, with a branch cut along the negative real axis.
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27 These functions shall return the complex natural logarithm value, in
28 the range of a strip mathematically unbounded along the real axis and
29 in the interval [-ipi, +ipi] along the imaginary axis.
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32 No errors are defined.
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34 The following sections are informative.
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37 None.
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49 cexp(), the Base Definitions volume of IEEE Std 1003.1-2001, <com‐
50 plex.h>
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53 Portions of this text are reprinted and reproduced in electronic form
54 from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
55 -- Portable Operating System Interface (POSIX), The Open Group Base
56 Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
57 Electrical and Electronics Engineers, Inc and The Open Group. In the
58 event of any discrepancy between this version and the original IEEE and
59 The Open Group Standard, the original IEEE and The Open Group Standard
60 is the referee document. The original Standard can be obtained online
61 at http://www.opengroup.org/unix/online.html .
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65IEEE/The Open Group 2003 CLOG(3P)