icas1

Usage

Overview

giac is an advanced symbolic and numeric calculator. The console interface is named icas or equivalently giac. The corresponding GUI program is called xcas.

These programs have extensive documentation. The GIAC/XCAS manual is 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

--version

Show version of program.

--texmacs

To call giac/icas from inside Texmacs. Users should not need to do this.

--emacs

To call giac/icas from inside Emacs. Users should not need to do this.

--sage

To call giac/icas from inside Sage. Users should not need to do this.