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Close  1. Software

  Version 3 stable

To avoid problem of administrator rights, this version can be downloaded as a ZIP file (20 Mo)

To use the ZIP file, please extract the Casyopee directory into an allowed directory and run casyopee.exe.
It should run directly in English, and you can choose your language via  the Options Langue .menu.

Note that if the NotePad does not display correctly because of a restriction on the temporary directory, you can change it via the

You can also use this version from an USB key.

Important: if using for the first time, please read the "Casyopee Getting started manual" (documentation downloads) or the online help ( also a menu entry on the website).

Looking at videos demonstrating Casyopée on Olivier Leguay's very exciting blog is also quite usefulée

In case of problem when using with XP please see here

In case characters display  uncorrectly, please modify by

Configuration Panel

Regional and linguistic Options 


Language  for non unicode software
 please select Français (France)

For using with Macintosh OS,  you need a windows emulation .

For using with Linux, please use Wine, see here

Version 3.5.1 Correction bug on intersection. New Splash Screen.

Version 3.5.0 Numerous internal improvements, including redesign of the numeric evaluator and improvement of precision in the GD. Files prior to     version 3.3.0 are no longer loaded. Use version 3.4.6 for download on the site.

Version 3.4.9 Fix on fonc algo

Version 3.4.8 Environnement "sequences". User guide  (sorry French only)

Version 3.4.7 Numerical Evaluation enhanced. Approximate values' ​significant digits in the in the option menu. Points' labels move with the mouse. Variables declared in the algorithms are considered local.

Version 3.4.6 Corrections (modelling) 

Version 3.4.5 

Adaptation for Linux. Bug on geometrical calculations and formulas whose length exceeds 1024.

Version 3.4.4

Switch Radians/Degré. See here. Bugs on reported points.

Version 3.4.2

correction bugs (intersections, area between curve and line)

Version 3.4.1

correction bugs (modelling, comments in programs)

Version 3.4.0

Enhancement and localisation of the programming environment (function defined by an algorithm) after experimenting.

Option: Creation of functions with values in R² (parametric curves)

See documentation and examples of use in the on line Help

Version 3.3.6

finalisation of the programming environment (function defined by an algorithm)

To do: localisation and English documentation.

Bugs corrected in version 3.3.4:

1. loading functions with exponentials in .CAS files

2. saving and loading values of the variables in .CAS files

Bugs corrected in version 3.3.3:

1. parameters created automaticly

2. wheel in the graphic window

3. redefinition of points

Bugs corrected in version 3.3.2:

  about expressions (updating and saving)

Bugs corrected in version 3.3.1:

1. modification of properties of parameters: Casyopée issues a warning, most of the time irrelevant, when the parameter is used in the fomula of a function. In this case please simply ignore and confirm.

2. problem of display of geometrical loci. Kb) Downloaded 3125 times Download Hyperlink  Preview  Print... 

Since version 3.3.7, Casyopée does not load anymore the  files .CAS prior to version 3.3.0.
This version 3.3.6 is able to load these files and to save them in the new format.
Please unzip the folder V_3_4_6 in a Casyopee3 folder, and run  Casyop346.exe in this folder. 857.06 Kb) Downloaded 540 times Download Hyperlink  Preview  Print... 

Casyopée Upgrade latest version.

Automatic update works from version 3.2.6.

This is the "by hand" procedure for previous version 3.

Download the file maj.exe into the /casyopee3 directory (where casyopee.exe is).
If you want to keep the existing version, rename casyopee.exe into casyopee_old.exe.

run maj.exe

In case you did not rename casyopee.exe, you will be prompted to confirm replacement.

In case you do not want to keep the previous version, you can erase the directory V_3_y_x  

Run casyopee.exe as usual.

maj.exe(1 575.68 Kb) Downloaded 1676 times Download Hyperlink  Preview  Print... 

Close  2. Documentation

The manual in French

65 pages 

manuel_prise_en_main-pas_a_pasRev3_1.pdf(2 488.11 Kb) Downloaded 2590 times Download Hyperlink  Preview  Print... 

 For this manual, our choice has been to introduce the user by offering several situations with a step‐by step guidance. It will be complemented by an online reference manual specifying the capabilities and options.

The preliminary activity is about mathematics expressions in Casyopée. 

The first three sections introduce to the notion of function in Casyopée.

The next sections detail the Casyopée’s capabilities in dynamic geometry especially to model dynamic dependencies.

Another  section illustrates how a curve of a function defined symbolically can be handled as a geometrical object and the case of parametric curves.

Finally, the manual presents geometrical locus.

65 pages

GettingStartedManualV3.pdf(2 342.93 Kb) Downloaded 889 times Download Hyperlink  Preview  Print... 

ModeEmploiCasyop.pdf(0.00 Kb) Downloaded 823 times Download Hyperlink  Preview  Print... 

PresCasyopV3En.pdf(665.08 Kb) Downloaded 663 times Download Hyperlink  Preview  Print... 

Close  3. Films presenting classroom situations (in French)

distance_point_parabole.wmv(56 920.79 Kb) Downloaded 859 times Download Hyperlink  Preview  Print... 

soustangente.flv(16 789.08 Kb) Downloaded 751 times Download Hyperlink  Preview  Print... 

PresSigneProdAffine.wmv(73 443.51 Kb) Downloaded 985 times Download Hyperlink  Preview  Print...