Galvagni Figures & Reid Figures for Heptominoes

A heptomino is a figure made of seven 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.

Some of these figures were found by Michael Reid of the University of Central Florida and Erich Friedman of Stetson University.

For pentominoes, see Galvagni Figures & Reid Figures for Pentominoes. For hexominoes, see Galvagni Figures & Reid Figures for Hexominoes.

Here are minimal known Galvagni figures for heptominoes.

Here are the unsolved heptominoes:

And here are minimal known Reid figures:

Last revised 2008-11-28.

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Col. George Sicherman [ HOME | MAIL ]