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Continuum theory, point-set topology, spaces with algebraic structure, foundations, dimension theory, local and global properties.

1 vote

Is the universal covering of an open subset of $\mathbb{R}^n$ diffeomorphic to an open subse...

I don't have an answer, only a heuristically inspired hunch. If we think of the figure eight, we can thicken it slightly to an open connected set in the plane. The universal cover is the universal TV …
Marius Overholt's user avatar