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

13 votes

Independent evidence for the classification of topological 4-manifolds?

There is no other evidence. In fact there is absolutely no evidence what so ever. I have never met a mathematician who could convince me that he or she understood Freedman`s proof. I attempted to read …
Karl Luttinger's user avatar