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| author | Michael Kerrisk <mtk.manpages@gmail.com> | 2006-04-21 01:21:26 +0000 |
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| committer | Michael Kerrisk <mtk.manpages@gmail.com> | 2006-04-21 01:21:26 +0000 |
| commit | 4334d114e9da094493daee0ee0c9abdcfaeb1ad1 (patch) | |
| tree | 69eb75fefc5e00b22120be7be839a7162847bc97 | |
| parent | 481aaca1a5fa966ece74d8b578cc9be987f2c04f (diff) | |
| download | man-pages-4334d114e9da094493daee0ee0c9abdcfaeb1ad1.tar.gz | |
Link to new location
| -rw-r--r-- | man5/complex.5 | 51 |
1 files changed, 2 insertions, 49 deletions
diff --git a/man5/complex.5 b/man5/complex.5 index 227e607599..329ba484dd 100644 --- a/man5/complex.5 +++ b/man5/complex.5 @@ -1,49 +1,2 @@ -.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de) -.\" Distributed under GPL -.\" -.TH COMPLEX 5 2002-07-28 "" "complex math" -.SH NAME -complex \- basics of complex mathematics -.SH SYNOPSIS -.B #include <complex.h> -.SH DESCRIPTION -Complex numbers are numbers of the form z = a+b*i, where a and b are -real numbers and i = sqrt(\-1), so that i*i = \-1. -.br -There are other ways to represent that number. The pair (a,b) of real -numbers may be viewed as a point in the plane, given by X- and -Y-coordinates. This same point may also be described by giving -the pair of real numbers (r,phi), where r is the distance to the origin O, -and phi the angle between the X-axis and the line Oz. Now -z = r*exp(i*phi) = r*(cos(phi)+i*sin(phi)). -.PP -The basic operations are defined on z = a+b*i and w = c+d*i as: -.TP -.B addition: z+w = (a+c) + (b+d)*i -.TP -.B multiplication: z*w = (a*c \- b*d) + (a*d + b*c)*i -.TP -.B division: z/w = ((a*c + b*d)/(c*c + d*d)) + ((b*c \- a*d)/(c*c + d*d))*i -.PP -Nearly all math function have a complex counterpart but there are -some complex only functions. -.SH EXAMPLE -Your C-compiler can work with complex numbers if it supports the C99 standard. -Link with \-lm. The imaginary unit is represented by I. -.sp -.nf -/* check that exp(i*pi) == \-1 */ -#include <math.h> /* for atan */ -#include <complex.h> -main() { - double pi = 4*atan(1); - complex z = cexp(I*pi); - printf("%f+%f*i\\n", creal(z), cimag(z)); -} -.fi -.SH "SEE ALSO" -.BR cabs (3), -.BR carg (3), -.BR cexp (3), -.BR cimag (3), -.BR creal (3) +.so man7/complex.7 +.\" FIXME . this link will eventually be removed (created Apr 2006) |