My abacus applet , illustrating how a class of category theory problems can emulate any Turing machine
Jamie Layne's geometry applet . Jamie wrote this as a term project for MAT434 in the fall of 2001. It shows how three special points associated with a triangle line up on the Euler line.
My applet for a possibly new graph automaton It is played on a square grid, like Conway's Life ; but it uses the edges of the grid, not the cells.
Another graph automaton based on grid edges.