The EqWorld website presents extensive information on algebraic, ordinary differential, partial differential (mathematical physics), integral, and other mathematical equations. The website contains over 1000 html and pdf files.
In this site one can print copies of polyhedron puzzles (for non-commercial purposes only) and one can read several mathematical articles on the subject.
We retail software for numerical solution of stochastic differential equations such as arise in science, engineering and mathematical finance. We offer a free trial period and also make available a number of free programs.
XLSTAT is a user friendly data analysis and statistical add-on for Microsoft Excel. XLSTAT allows users to run over 40 statistical functions, including regression, Anova, principal component analysis, box plots. This toolbox is used by over 10000 users in 70 countries. Available in English and French.