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This tag is used if a reference is needed in a paper or textbook on a specific result.

16 votes
4 answers
2k views

Point sets in Euclidean space with a small number of distinct distances

It is well known and not hard to prove that the regular simplex in n-dimensions is the only way to place n+1 points so that the distance between distinct pairs of points is always the same. My general …
Edmund Harriss's user avatar
13 votes
1 answer
3k views

What nets fold to polyhedra?

There is a classic (and open) problem asking whether every polyhedron can be unfolded to give a non-overlapping net. The converse problem has been studied asking which polygons can be folded in some m …
Edmund Harriss's user avatar