Provided by: xcas_1.4.9.69+dfsg1-2build1_amd64

**NAME**

giac - computer algebra system

**SYNOPSIS**

giac[options]filesicas[options]filesxcasfiles

**DESCRIPTION**

giacis an advanced symbolic and numeric calculator. The console interface is namedicasor equivalentlygiac. The corresponding GUI program is calledxcas. These programs have extensive documentation. TheGIAC/XCASmanualis available in Info format by invoking `info giac`, and in HTML and DVI format in/usr/share/giac/doc. One can also obtain some help about a keyword like this, from inside the program: 0>> ?gcd Returns the greatest common divisor of 2 polynomials of several variables or of 2 integers or of 2 rationals. (Intg(a) or Poly),(Intg(b) or Poly) gcd(45,75); gcd(15/7,50/9); gcd(x^2-2*x+1,x^3-1); gcd(t^2-2*t+1,t^2+t-2); gcd((x^2-1)*(y^2-1)*z^2,x^3*y^3*z+(-(y^3))*z+x^3*z-z) lcm,euler,modgcd,ezgcd,psrgcd,heugcd,Gcd The equivalent output may be retrieved by invoking (e.g.) `cas_help gcd`.

**OPTIONS**

--versionShow version of program.--texmacsTo call giac/icas from inside Texmacs. Users should not need to do this.--emacsTo call giac/icas from inside Emacs. Users should not need to do this.--sageTo call giac/icas from inside Sage. Users should not need to do this.

**SEE** **ALSO**

cas_help(1)

**AUTHORS**

giacis 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).

**LICENSE**

GPLv3+ 2017-02-08 GIAC(1)