12 Jul
2011
12 Jul
'11
6:06 p.m.
Are N and O tetrominos incompatible? On 7/12/2011 7:38 PM, Erich Friedman wrote:
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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