Galvagni Figures & Reid Figures for Pentominoes

A pentomino is a figure made of five squares joined edge to edge. A Galvagni figure is a figure that can be tiled by a polyform in more than one way—a kind of self-compatibility figure. A Reid figure is a Galvagni figure without holes.

Most of the pentomino Galvagni and Reid figures were found by Erich Friedman of Stetson University and Michael Reid of the University of Central Florida. Corey Plover found the minimal solution for the T pentomino.

Here are minimal known Galvagni figures for pentominoes.

And here are minimal known Reid figures:

Back to Polyform Curiosities.

Col. George Sicherman [ HOME | MAIL ]