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## HyperSolids

### About HyperSolids:

The Greeks proved that there are exactly five regular solids: the tetrahedron, cube, octahedron, dodecahedron, and icosahedron. In 1901, Ludwig Schlafli proved that there are exactly six regular solids in four dimensions, and only three regular solids in each dimension five or higher.
The program HyperSolids can show and rotate all regular solids in dimensions 3 and 4, and
show the ``faces'' of these solids.
The program is distributed under the GPL public license, and thus free. To obtain it using either Internet Explorer or OmniWeb, click on the link "Program" below and hold the mouse button down until a dialog appears. Choose the option of saving the file "hypersolids.tar.gz" to disk. Move the file to your home directory if it is not already there. Open a terminal window and type

- gzip -d hypersolids.tar.gz

and then
and then
Move the resulting program to the Applications directory.

Richard Koch

Department of Mathematics

University of Oregon

Eugene, Oregon 97403

(541) 346-5630

Email: <
koch@math.uoregon.edu
>