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

• Easy-to-use 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 easy-to-use
• 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

Non-linear fits: html tar.gz zip

A very simple and bad-working program for non-linear fits (polynomial, exponential, logarithmic, power, sinusoidal regressions) I wrote in the 90's.

Programming reference

LaTeX

• A (long) list of TeX mathematical symbols.
• Detexify: Forgot the command name for a TeX symbol? Draw it with your mouse and get the name.
• UK List of TeX FAQ (advanced).
• LaTeX at WikiBooks, a collaborative guide and reference.
• (In French) Une FAQ LaTeX assez longue.

C/C++/STL

• C Programming
• (in French) Introduction à la programmation en C
• C++ FAQ
• C++ Annotations to make the transition from C
• STL Tutorial
• The C++ Standard Template Library
• The Standard Template Library
• Mumit's STL Newbie guide, rather a FAQ on Standard Template Library
• Gtkmm documentation

HTML/CSS/PHP

• HTML 4.01 Specification
• CSS Specification
• PHP manual

Perl

• Perl language reference
• (In French) Introduction à PERL (just don't read the outdated CGI part...)

Postscript

• A First Guide to Postscript
• Ghostscript quick reference