OPTi Home Page Last update: 2002.6.18 What is OPTi OPTi is a Macintosh application program which visualizes quasi-conformal deformations of the once-punctured-torus groups. It interactively draws the isometric circles, the Ford region, the limit set, etc. Click for a large picture What's new OPTi 3.50 (20020618) OPTi 3.50 is now a Carbon application, which means that, when run on Mac OS X, ...

THE MD-ENERGY OF KNOTS AND MING Ying-Qing Wu This program and its related files are available via anonymous ftp from ftp.math.uiowa.edu in the directory of wu/ming. The MD energy is defined by J. Simon for polygonal knots. A polygonal knot K consists of several edges E_1, ..., E_n in the Euclidean space, which form a closed knotted loop. The ends of the edges are called the vertices of the knot.

Simplicial Homology, a (proposed) GAP share package Jean-Guillaume Dumas Frank Heckenbach B. David Saunders Volkmar Welker Version 1.1beta compatible with gmp-3, gcc-3 FUNCTIONALITIES: Calculate simplicial homology of finite simplicial complexes (with integer coefficients) Apply classical constructors and modifiers from algebraic topology to simplicial complexes Construct and modify order ...

SnapPea PC for Windows 95/98/NT The latest v2.6 updates are here, together with the standard files which were previously located at the Geometry Center. If you have questions, please check the readme file first, to find where to contact me (A.C.Manoharan). Helpful comments are welcome. Please let me know if you are using SnapPea for Windows in your research, and if you need any further features.

Overview. The Kenzo program is the last version (16000 Lisp lines, July 1998) of the CAT (= Constructive Algebraic Topology) computer program. Kenzo is also the name of my cat. The Kenzo program is a joint work with Xavier Dousson. The previous version EAT (May 1990) was a joint work with Julio Rubio. The Kenzo program is significantly more powerful than EAT, from several points of view. On one ...