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+.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
+.\" Distributed under GPL
+.\"
+.TH CLOG10 3 2002-07-28 "" "complex math routines"
+.SH NAME
+clog10, clog10f, clog10l \- base-10 logarithm of a complex number
+.SH SYNOPSIS
+.B #define _GNU_SOURCE
+.br
+.B #include <complex.h>
+.sp
+.BI "double complex clog10(double complex " z );
+.sp
+.BI "float complex clog10f(float complex " z );
+.sp
+.BI "long double complex clog10l(long double complex " z );
+.sp
+Link with \-lm.
+.SH DESCRIPTION
+The logarithm is defined as log10(cabs(z))+I*carg(z).
+Please note that z close to zero will cause an overflow.
+.SH "CONFORMING TO"
+The function is a GNU extension.
+It is reserved for future use in C99.
+.SH "SEE ALSO"
+.BR cabs (3),
+.BR cexp (3),
+.BR clog (3),
+.BR clog2 (3),
+.BR complex (5)