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Top Questions

Do Hausdorff spaces that aren't completely regular appear in practice?

general-topology separation-axioms asked Jun 9 '16 at 14:35

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Oldest proto-languages

historical-linguistics comparative-linguistics asked Aug 24 '15 at 2:43

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Optional arguments and &

optional-arguments tikz-cd ampersand asked Oct 13 '14 at 3:36

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Wrong hyphenation with \usepackage[croatian]{babel}

babel hyphenation asked Feb 8 '15 at 19:22

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Top Answers

What's your favorite proof accessible to a general audience?

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$F$ is an equivalence of categories implies that $F$ is fully faithful and essentially surjective

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Why is the cartesian product so categorically robust?

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Intuition on the Representable Functor

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Why are adjoints usually defined in terms of hom-sets?

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Why is the forgetful functor representable?

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Must 2 Tensor Product Functors be Naturally Isomorphic?

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Faithful functors from Rel, the category of sets and relations?

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Different interpretations of a monoid as a category

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Exact functors preserve free modules?

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Adjoint squares

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Is there an easy way to type IPA?

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Is the category of (co)cones a slice category?

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Categories like $\mathsf{FinSet}$, but with elements of $\mathbb{Z}$ or $\mathbb{Q}$ as objects?

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Intuition behind universal arrow construction of adjoint functors

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What does 'coherent isomorphism' mean in the sense of pseudofunctors?

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