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A comment on Pentagon Tiling Proof Solves Century-Old Math Problem. Parent comment

Re:Pentagon Tiling Proof Solves Century-Old Math Problem by Terr_ on Tuesday July 11, 2017 @05:27PM (#14748231)
> I assume they mean a shape that can only tile the plane non-periodically.

Yes, they probably [0] mean aperiodic, or "exclusively non-periodic".

[0] https://en.wikipedia.org/wiki/Einstein_problem

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