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.TH CAS_HELP 1 "2017-02-08"
.\" Please adjust this date whenever revising the manpage.
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.SH NAME
cas_help \- help for the giac/xcas computer algebra system
.SH SYNOPSIS
.B cas_help
.RI " keyword"
.br
.B en_cas_help
.RI " keyword"
.br
.B es_cas_help
.RI " keyword"
.br
.B fr_cas_help
.RI " keyword"

.SH DESCRIPTION
.PP
.\" TeX users may be more comfortable with the \fB<whatever>\fP and
.\" \fI<whatever>\fP escape sequences to invode bold face and italics,
.\" respectively.
This is the help engine of the symbolic and numeric calculator \fBgiac\fP  by
Bernard Parisse. It is available in some different languages.

.SH EXAMPLE
.B cas_help
gcd
.TP
Help for gcd:
.br
gcd((Intg(a) or Poly),(Intg(b) or Poly))
.br
Returns the greatest common divisor of 2 polynomials of several variables or of 2 integers or of 2 rationals.
.br
See also: 1/ lcm 2/ euler 2/ modgcd 3/ ezgcd 4/ psrgcd 5/ heugcd 6/ Gcd
.br
Ex1:gcd(45,75)
.br
Ex2:gcd(15/7,50/9)
.br
Ex3:gcd(x^2-2*x+1,x^3-1)
.br
Ex4:gcd(t^2-2*t+1,t^2+t-2)
.br
Ex5:gcd((x^2-1)*(y^2-1)*z^2,x^3*y^3*z+(-(y^3))*z+x^3*z-z)
.br

.SH SEE ALSO
\fBicas\fR(1), \fBxcas\fR(1)

.SH AUTHORS
\fBgiac\fR is written by Bernard Parisse.
https://www-fourier.ujf-grenoble.fr/~parisse/giac.html

This manual page was written by Carleos Artime <carleos@pinon.ccu.uniovi.es>
and Ximin Luo <infinity0@debian.org> for the Debian GNU/Linux system (but may
be used by others).

.SH LICENSE
GPLv3+