Program Name

	4D
	
Author

	Richard Koch
	Mathematics Department
	University of Oregon
	Eugene, Oregon  97403
	
	(503)346-5630     (office)
	(503)346-4705     (mathematics office)
	(503)686-8466     (home)
	
	koch@bright.uoregon.edu
	
Category
	
	Mathematics
	
Description

	The program displays a four dimensional cube. The cube can be rotated in four dimensional space and the eight cells which make up its boundary can be hilighted.
	
	A cube is a regular solid. All such regular solids are known. A menu allows the user to display any of the regular three dimensional solids (of course there are five) and any of the regular four dimensional solids (there are six) and rotate them in four-space. This exhausts the list of interesting regular solids because in all dimensions greater than four there are only three: the tetrahedron, cube, and octahedron.

Uses

	We often show classes the film made by Tom Banchof at Brown University about the four dimensional cube. After seeing the film, students can use this program to manipulate the object themselves.
	
NeXT Release

	2.1
	
Installation Instructions 

	None needed.
	
Comments 

	This program can be distributed freely.