Galvagni Figures for Rotary Polyominoes

A polyomino is 2-rotary if it looks the same when rotated 180°. It may also have mirror symmetry or 4-rotary symmetry (90 °).

A Galvagni Figure is a shape that can be tiled by a polyform in two or more ways. The ways may be isomorphic, so long as they have different positions. They were proposed by Jeremy Galvagni and first appeared at Erich Friedman's site Math Magic.

Here I show known Galvagni Figures for Rotary Polyominoes. Thanks to Mark Smith for suggesting this page.

Monomino

No Solution

Domino

Tromino

Tetrominoes

No Solution

Pentominoes

No Solution

Hexominoes

Heptominoes

No Solution

Octominoes

No Solution

Enneominoes

No Solution

Decominoes

No Solution

Last revised 2020-10-30.


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Col. George Sicherman [ HOME | MAIL ]