What's new (large changes)?

• 1.9.0-49: Univariate polynomials rootfinder enhancements
• 1.9.0-47: Spanish translation enhancements by compsystems
• 1.9.0-23: English documentation new layout/fixes by Luka Marohnić
• 1.9.0-13: improvements by Luka Marohnić mainly in nlpsolve (implements now a fast and robust interior-point algorithm, alongside Nelder-Mead and differential evolution methods for derivative-free optimization) and global minimization of a continuous function on a segment (find_minimum). Integration of the 3d renderer for calculators, gives now an simpler alternative to OpenGL (useful if OpenGL inside Xcas raises bugs like black screen).
• 1.9.0-5: compatibility with new Numworks calculator bootloader
• version 1.7.0-43: changing interpreter in Xcas web is now much easier, improved Numworks connectivity
• version 1.7.0-25: improvements and fixes by Luka Marohnić in graph theory commands, better graphs inside texmacs
• version 1.7.0-19: Numworks connectivity (Windows and Linux)
• version 1.7.0-13 and 17: polynomial system solver optimizations (rational univariate representation computation and real root isolation)
• version 1.7.0: Javascript interpreter added: QuickJS
• version 1.6.17: compatibility with calculators (KhiCAS sessions for Numworks, TI nspire CX), inclusion of a MicroPython interpreter (with builtin modules for teaching), you can switch interpreter by typing python or xcas in an empty commandline.
• version 1.6.0: Improved FFT over finite field, half-GCD implementation.
• version 1.5.0 : graphtheory, signalprocessing by Luka Marohnic, LambertW function, some optimizations and improvements
• version 1.4.9 (March 2018)
  Python compatibility mode,
  improved interface for Firefox
  new optimizations commands written by Luka Marohnic,
  English user manual corrected by Jay Belanger.
• version 1.2.3 (july 2017) some speedups and bug fixes
• version 1.2.2 (december 2015) improved Groebner basis engine
• version 1.2.0 (may 2015): sparse matrices (inside tables) and a few related linear algebra algorithms.
• version 1.1.4 (february 2015): some improvements in numeric linear algebra (for example linsolve now accepts the LU decomposition as argument for faster linear system solving)
• version 1.1.3 (december 2014): New functions for sound: soundsec, playsnd, and simplification for writewav. fft now calls GSL if available and is therefore faster.
• version 1.1.2 (september 2014): Rational univariate representation for solving polynomial systems efficiently. Fast modular Groebner basis engine (already there in recent 1.1.0).
  Interval arithmetic.
• version 1.1 (july 2013): more commands for probability and statistics. Many bug fixes. Adaptive numeric integration.
• version 1.0 (november 2012): syntaxic coloration in commandlines.
• version 0.9.9: easier construction of non-prime finite fields (GF), optimizations for determinant/inverse of matrices with integer coefficients (for example det(hilbert(100)) takes 0.56s on an AMD 64 bits at 2.8_GHz).
• version 0.9.8: quadratic sieve for factoring integers from 40 to 77 digits (speed between PARI and msieve/yafu)
• version 0.9.5: lapack support
• version 0.9.4: access to matrices starting at 1 instead of 0 in Xcas mode with double-brackets, e.g. M[[1,2]]. Enlarge/Shrink program editor with F5/F6. The reference card is now installed (instead of online).
• version 0.9.3: some commands now accepts function, for example f(x):=sin(x)*x; g:=f'
• version 0.9.0:
  New item in Help->Internet: reference card
  Documentation is now translated from LaTeX using hevea instead of latex2html: size as decreased with similar rendering quality
  New algorithms implemented for GCD and factorization of multivariate polynomials, resulting in sometimes significant speedup for many simplifications.
  The windows version is compiled with the latest cygwin version (1.7), it is no more compatible with windows version older than XP.

Android

• The recommended way to run Xcas (if your smartphone is not too old) is to install Firefox for Android from Google Play, then open Xcas online offline (this will also work with the default Chrome browser, but computations are faster and 2d rendering is better with Firefox).
• If you are on an arm64, have installed Userland and configured Debian inside, then you can install the latest version of Xcas by downloading the giac and giac-dbgsym packages with the command sudo dpkg -i giac*arm64.deb then sudo apt-get -f install
  N.B.: these packages are not compatible with the Debian Xcas packages (that are a little bit outdated), if you installed them, you must remove them with dpkg --remove xcas libgiac0
• On Google Play, there is a free application for tablets (does not work on some old smartphones) based on giac, named XcasPad written by Leonel Hernandez.

iOS (iPhone/iPad)

Xcas for Windows

• If you experience a black window while running 3d commands (like plane(z=0)) try to disable hardware acceleration (search with your favorite engine windows disable hardware acceleration).
• Xcas should work on all versions of Windows from Windows XP to Windows 11, but some people have reported problems with Windows 8 for 3d. If Xcas does not work on your Windows version, you can install VirtualBox and a Linux distribution.
• If you want preview support, please install Ghostscript and GSview (there are two packages too install)
• Since version 0.6.3 of Xcas for Windows, the xcas.exe binary is linked to a DLL (giac.dll), hence the standalone text version icas.exe has been added, and Cygwin developers may use giac.dll to include symbolic functions in their C++ programs.

Xcas for Mac OS X

• Mac OS 14 Download this version (in tests), open the file, open the disk image inside, then click on Xcas.pkg while keeping the control key pressed and choose Open (this way you can allow installing a non signed package).
  Or compile Xcas following these instructions .
• For Mac OS 11.6, get this package, maintained by Leonel Hernandez.
• On Mac OS X.10, it is recommended to install this version (without Qcas and with Python 2.7 module only).

• Once installed, you can run Xcas like any other application (from Applications) or from a Terminal by the command /Applications/usr/bin/xcas. The commandline version is /Applications/usr/bin/icas.
• If you prefer to install Xcas in another folder, for example /Applications/xcas instead of /Applications/usr, you need to set two environment variables to access to the documentation and locale menus
  export XCAS_ROOT=/Applications/xcas/share/giac/
  export XCAS_LOCALE=/Applications/xcas/share/locale/
  
• You can install Xcas.pkg without admin priviledges, open a Terminal from launchpad, and copy-paste these commands:
  cd /tmp
  tar xvf /Volumes/Xcas/Xcas.pkg Payload
  cd /Applications
  tar xvf /tmp/Payload

Xcas for Linux

Fedora, OpenSuse, Mageia

Debian packages (Debian, Ubuntu: i386 32, 64 bits, ARM)

• Recent Debian/Ubuntu distributions
  Open your favorite package manager and search for xcas. The version is not necessarily the most recent one, therefore you might want to install Xcas manually.
• Compile your own packages This is the recommended install mode if you want to have an up to date version.
  • open a Terminal (or Konsole)
  • install dependancies: copy-paste the followind command
    sudo apt-get install gcc g++ libgmp-dev libmpfr-dev libmpfi-dev libpari-dev libgsl0-dev libxext-dev libpng-dev libjpeg-dev libreadline-dev libncurses5-dev mesa-common-dev libx11-dev libxt-dev libxft-dev libntl-dev libgl1-mesa-dev libgl-dev libao-dev hevea debhelper libfltk1.3-dev
    If sudo does not work for you, you will have to edit /etc/sudoers as root and try again.
  • get sources and compile as packages
    wget https://www-fourier.univ-grenoble-alpes.fr/~parisse/giac/giac_stable.tgz
    tar xvfz giac_stable.tgz
    cd giac-1.9.0
    ./mkdebian
  • install packages
    sudo dpkg -i ../giac*deb
• If you have problems with 3d commands, please check the note above.
• Ubuntu 20: download giac and giac dbgsym, then from a Terminal issue the following command
  sudo dpkg -i Downloads/giac*deb && sudo apt-get -f install
• Debian 10/11: download giac and dbgsym (Debian 10) or giac and dbgsym (Debian 11) then from a Terminal issue the following command
  sudo dpkg -i Downloads/giac*deb && sudo apt-get -f install
• Debian 7-9: Type the command
  sudo add-apt-repository "deb http://www-fourier.univ-grenoble-alpes.fr/~parisse/debian/ stable main"
  Or add the line
  deb http://www-fourier.univ-grenoble-alpes.fr/~parisse/debian/ stable main
  in the file /etc/apt/sources.list. On Ubuntu, replace stable by testing. Then run
  sudo apt-get update
  Now you can install or upgrade by running
  sudo apt-get install giac python-giacpy
  (python-giacpy is optionnal, it's for Python programmers support).
  If install fails, with old distributions, you can try old instead of stable in /etc/apt/sources.list and run again both commands.
  If install fails because of libpng12 dependency on Ubuntu, add
  deb http://fr.archive.ubuntu.com/ubuntu xenial main
  to /etc/apt/sources.list.
  If you do not want to get warning messages about invalid/unknown key, download the Xcas public GPG key and run the following command in a terminal from the directory where you stored the key
  sudo apt-key add xcas_public_key.gpg
  
• If you want to test the latest version, use the following line instead
  deb http://www-fourier.univ-grenoble-alpes.fr/~parisse/debian/ testing main
  
• If it does not work, try to install one or more packages as explained below.
  • all in one package (i386, 1.9.0, compiled on Ubuntu 12.04) HTTP
  • all in one package (x64, 1.9.0) HTTP
  To install type
  sudo dpkg -i *giac*.deb
• If dpkg complains about missing packages, check the package names and issue an apt-get command like
  sudo apt-get install libstdc++5
• If you have an error reporting that libreadline.so.5 is missing, install it (sudo apt-get install readline5) or if readline is already installed (e.g. version 6), type the commands
  cd /usr/lib; sudo ln -s libreadline.so.6 libreadline.so.5 ; sudo ldconfig
• Carlos Enriqe Carleos Artime made the first giac packages.

Xcas for archlinux

Incompatibility with Unity

Note for 3-d on Linux

KhiCAS: Giac/Xcas for Casio CG10/20/50 and Fx-9750GIII, Fx-9860GIII

KhiCAS: a CAS for your Numworks N0110 calculator

KhiCAS: Xcas and Python for the TI Nspire calculator

• Khicas for most TI Nspire CX and CX-II, For those with a so-called 240x320 screen, like CX HW-W, please use this archive.
  Copy the ndless directory from the archive into your calculator with TI connectivity kit. Run the ndless installer corresponding to your OS once. Then run khicas (math+programming in a shell) or khicaslua (math only).
  For more information on ndless, see CX or CX II
• For monochrom nspire, you can install this light version.

Xcas Linux ARM

Xcas Windows CE