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Diffstat (limited to 'man3/clog.3')
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diff --git a/man3/clog.3 b/man3/clog.3 new file mode 100644 index 000000000..f3a73795c --- /dev/null +++ b/man3/clog.3 @@ -0,0 +1,31 @@ +.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de) +.\" Distributed under GPL +.\" +.TH CLOG 3 2002-07-28 "" "complex math routines" +.SH NAME +clog, clogf, clogl \- natural logarithm of a complex number +.SH SYNOPSIS +.B #include <complex.h> +.sp +.BI "double complex clog(double complex " z ); +.sp +.BI "float complex clogf(float complex " z ); +.sp +.BI "long double complex clogl(long double complex " z ); +.sp +Link with \-lm. +.SH DESCRIPTION +The logarithm clog is the inverse function of the exponential cexp. +Thus, if y = clog(z), then z = cexp(y). +The imaginary part of y is chosen in the interval [-pi,pi]. +.LP +One has clog(z) = log(cabs(z))+I*carg(z). +.LP +Please note that z close to zero will cause an overflow. +.SH "CONFORMING TO" +C99 +.SH "SEE ALSO" +.BR cabs (3), +.BR cexp (3), +.BR clog10 (3), +.BR complex (5) |