12 Jul
2011
12 Jul
'11
5:40 p.m.
no. the I and Y pentominoes both tile this region: xooooo ooooox the X and Y pentominoes both tile this region: xoxxx oooox xoooo xxxox but the I and X pentominoes are incompatible. erich
For polyominoes A and B, let A ~ B if A and B each tile the same nonempty polyomino. Is A ~ B an equivalence?
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