
Oliver Goodman Title: PostDoctoral Fellow Dates: March 23, 1992  September 15, 1994 Currently at: University of Melbourne, Australia Email: oag@geom.umn.edu Personal Homepage: http://www.maths.mu.oz.au/~oag

Snap based on Jeff Weeks' program SnapPea for computing hyperbolic structures and invariants of hyperbolic 3manifolds. Snap makes use of Pari's high precision arithmatic and number theoretic functions to compute invariant trace fields See Neumann, Hodgson et.al. in Topology '90, Proceedings of the Research Semester in Low Dimensional Topology at Ohio State University. Berlin New York: de Gruyter 1992, for information about invariant trace fields and arithmetic invariants of 3manifolds in general. snap1.2.tar.Z 768K.
TightSpan Mathematica package for computing tight spans of finite metric spaces. The tight span of a metric space is (roughly) the smallest contractible path geodesic metric space into which the original space embeds isometrically. The package also contains Mathematica functions to compute intersections of halfspaces in any dimension and functions to compute the face lattice of a polytope. See the enclosed README for further details and references. tightspan1.0.tar.Z 17.6K.
Mathpad is an installable external package for Iris Mathematica users. Mathpad provides the user of Mathematica with interactive graphics, a facility which is missing from basic Mathematica. It contains two items: a program which runs alongside Mathematica with a window open in which graphics can be displayed, and a package which aids interaction with the graphics program. mathpad1.0.tar.Z 33.6K.
Hyperbolic.m Mathematica package for carrying out computations in ndimensional hyperbolic geometry and displaying 2 and 3dimensional results visually in a variety of models.
CirclePack.m Mathematica package to compute circle packings on geometric surfaces. Those interested in circlepackings should look at Ken Stephenson's much more extensive (UNIX/Xwindows) package of the same name.
Geomview conformal model Designed and initially implementated Geomview's Poincare ball model view of hyperbolic 3space. Geomview is a multipurpose, multiplatform, free, geometric visualization program. One of its unique features is the ability to view geometric structures in spherical and hyperbolic geometry as well as the more familiar euclidean kind.
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Created: Nov 19 1995 
Last modified: Oct 24 12:15:02 1997