CLOG(3) BSD Library Functions Manual CLOG(3)NAME
clog -- complex logarithm function
SYNOPSIS
#include <complex.h>
double complex
clog(double complex z);
long double complex
clogl(long double complex z);
float complex
clogf(float complex z);
DESCRIPTION
clog(z) returns the complex logarithm of z.
clog(conj(z)) = conj(clog(z)), for all complex floating-point numbers z.
SPECIAL VALUES
The conjugate symmetry of clog() is used to abbreviate the specification of special values.
clog(-0 + 0i) returns -inf + Pi i and raises the divide-by-zero flag.
clog(0 + 0i) returns -inf + 0i and raises the divide-by-zero flag.
clog(x + inf i) returns inf + Pi/2 i, for finite x.
clog(x + NaN i) returns NaN + NaN i.
clog(-inf + yi) returns inf + Pi i, for finite positive y.
clog(inf + yi) returns inf + 0i, for finite positive y.
clog(-inf + inf i) returns inf + 3Pi/4 i.
clog(inf + inf i) returns inf + Pi/4 i.
clog(+-inf + NaN i) returns inf + NaN i.
clog(NaN + yi) returns NaN + NaN i, for finite y.
clog(NaN + inf i) returns inf + NaN i.
clog(NaN + NaN i) returns NaN + NaN i.
NOTES SEE ALSO cexp(3)log(3)complex(3)STANDARDS
The clog() function conforms to ISO/IEC 9899:2011.
4th Berkeley Distribution December 11, 2006 4th Berkeley Distribution
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CLOG(3) BSD Library Functions Manual CLOG(3)NAME
clog -- complex logarithm function
SYNOPSIS
#include <complex.h>
double complex
clog(double complex z);
long double complex
clogl(long double complex z);
float complex
clogf(float complex z);
DESCRIPTION
clog(z) returns the complex logarithm of z.
clog(conj(z)) = conj(clog(z)), for all complex floating-point numbers z.
SPECIAL VALUES
The conjugate symmetry of clog() is used to abbreviate the specification of special values.
clog(-0 + 0i) returns -inf + Pi i and raises the divide-by-zero flag.
clog(0 + 0i) returns -inf + 0i and raises the divide-by-zero flag.
clog(x + inf i) returns inf + Pi/2 i, for finite x.
clog(x + NaN i) returns NaN + NaN i.
clog(-inf + yi) returns inf + Pi i, for finite positive y.
clog(inf + yi) returns inf + 0i, for finite positive y.
clog(-inf + inf i) returns inf + 3Pi/4 i.
clog(inf + inf i) returns inf + Pi/4 i.
clog(+-inf + NaN i) returns inf + NaN i.
clog(NaN + yi) returns NaN + NaN i, for finite y.
clog(NaN + inf i) returns inf + NaN i.
clog(NaN + NaN i) returns NaN + NaN i.
NOTES SEE ALSO cexp(3)log(3)complex(3)STANDARDS
The clog() function conforms to ISO/IEC 9899:2011.
4th Berkeley Distribution December 11, 2006 4th Berkeley Distribution
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