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most citedA Proof that Thompson's Groups have Infinitely Many Relative Ends

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math.GT2009

A proof of Sageev's Theorem on hyperplanes in CAT(0) cubical complexes

Daniel Farley

We prove that a hyperplane in a CAT(0) cubical complex X has no self-intersections and separates X into two convex complementary components. These facts were originally proved by S…