mirror of https://github.com/mkerrisk/man-pages
30 lines
821 B
Groff
30 lines
821 B
Groff
.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
|
|
.\" Distributed under GPL
|
|
.\"
|
|
.TH CSQRT 3 2002-07-28 "" "Linux Programmer's Manual"
|
|
.SH NAME
|
|
csqrt, csqrtf, csqrtl \- complex square root
|
|
.SH SYNOPSIS
|
|
.B #include <complex.h>
|
|
.sp
|
|
.BI "double complex csqrt(double complex " z ");"
|
|
.br
|
|
.BI "float complex csqrtf(float complex " z ");"
|
|
.br
|
|
.BI "long double complex csqrtl(long double complex " z ");"
|
|
.sp
|
|
Link with \fI\-lm\fP.
|
|
.SH DESCRIPTION
|
|
Calculate the square root of a given complex number,
|
|
with non-negative real part, and
|
|
with a branch cut along the negative real axis.
|
|
(That means that csqrt(\-1+eps*I) will be close to I while
|
|
csqrt(\-1\-eps*I) will be close to \-I, if eps is a small positive
|
|
real number.)
|
|
.SH "CONFORMING TO"
|
|
C99
|
|
.SH "SEE ALSO"
|
|
.BR cabs (3),
|
|
.BR cexp (3),
|
|
.BR complex (7)
|