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.
For octominoes, see Galvagni Figures & Reid Figures
for Octominoes.
Galvagni Figures
Hypersymmetric Variants
Unsolved
Reid Figures
Hypersymmetric Variants
Level Heptominoes
A level polyomino may be reflected orthogonally and rotated 180°
but not 90°.
Holeless Variants
Last revised 2014-10-31.
Back to Galvagni Compatibility
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Polyform Compatibility
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Polyform Curiosities
Col. George Sicherman
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