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Mathematical programs
Here are a few programs I wrote. All of them are free. The html files are
the presentation and documentation, and the archive files are the
programs themselves.
 Mathematical expression parser in C++: html tar.gz
 Easytouse library to interpret mathematical expressions written by the user
 Intended to be as loose as possible when interpreting the user's formulae (like e.g. sinxcos(x)^2)
 Internals use a stack mechanism to store the expressions, so that evaluation is quick
 C++ source downloadable
 Eqdiff: interactive drawing of vector fields, differential
equations, level curves...: html tar.gz zip
 Contains a nice grapher for ordinary functions
 Draws the integral curves of differential equations or vector fields, and level curves
 Gives an overview of the field of integral curves in a single click
 Graphical and easytouse
 Nice format for formula input
 Output to standard image formats
 For Unix or Windows
 Hypertex: Web page writing system: html

 formulas can be directly inserted into Web pages:
for .
 Takes in charge HTML headers, document structuration (subpages, internal links...)
 Simple macro processing
 For Unix (C source)
 Spectral gap of a graph: html tar.gz
 This little code computes an evaluation of the first eigenvalue of the discrete Laplacian of a graph (which, in particular, controls the rate of convergence of the random walk).
 C++ source downloadable
 For Unix
 Mathematical reminder included
 Outputs proven upper and lower bounds
 Cartographical mappings program: zip
 In connection with a mathematical article.
 Lots of projections, with explanations about their construction and mathematical properties
 Allows the user to define its own projections
 For Windows only, and in French
 See also the sources of the mathematical module
 Nonlinear fits: html tar.gz zip
 A very simple and badworking program for nonlinear fits
(polynomial, exponential, logarithmic, power, sinusoidal regressions) I
wrote in the 90's.
 LaTeX

 C/C++/STL

 HTML/CSS/PHP

 Perl

 Postscript

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