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Enriched categories, topoi, abelian categories, monoidal categories, homological algebra.
9
votes
Accepted
Category of Uniform spaces
There are two possible meanings of "uniform space" in the literature. I'll follow Isbell's terminology where the definition of a uniform space includes the separation axiom, and one speaks of a pre-un …
6
votes
Crossed module structure on homotopy groups
1) The book "2D homotopy and combinatorial group theory" (1993) is decidedly oriented towards applications and problem solving, and does discuss crossed modules in Chapters 2 and 4, and further mentio …