We need a formal standard definition of a topological sandwich. First attempt: A topological sandwich is a topological space S = B ∪ M ∪ B', such that: 1) Each of B, M, B' is homeomorphic to the unit ball, 2) Every path from a point of B to a point of B' intersects M.
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Crap. I was gonna say "Guys. It's time for some sandwich theory."
2:55 PM - 23 Nov 2017
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. Banned in Sweden. SubGenius, Zhuangist, white-hat troll. Defrocked mathematician. Brain problems.