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
Hendecominoes
Last revised 2023-11-26.
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Polyform Curiosities
Col. George Sicherman
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