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Answers
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2
Conventional names for finite categories
4
What is the precise relationship between “prodsimplicial sets” and rooted trees?
3
Tracking spectral sequence differentials
7
A programming language that can only create algorithms with polynomial runtime?
7
Thom’s Principle: rich structures are more numerous in low dimension
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Examples where it’s useful to know that a mathematical object belongs to some family of objects
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Homology or cohomology?
11
Geometric meaning of torsion in homotopy groups
4
Clearing misconceptions: Defining “is a model of ZFC” in ZFC
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Associativity with infinite nesting
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A conceptual proof that local fibrations over paracompact spaces are global fibrations?
2
What is your favorite isomorphism?
0
A canonical and categorical construction for geometric realization
2
Efficiently sampling points uniformly from the surface of an n-sphere
3
What do people mean by “subcategory”?
2
What is the earliest definition given by a universal mapping property?
10
How should one present curl and divergence in an undergraduate multivariable calculus class?
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Subset of the plane that intersects every line exactly twice
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Is there a category-theoretic definition of the arithmetic Grothendieck group
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How to motivate the skein relations?
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Do the empty set AND the entire set really need to be open?
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Why should I prefer bundles to (surjective) submersions?
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Are all mathematical theorems necessarily true?
2
Testing for Riemannian Isometry
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Name for “lower/upper bounds” of arbitrary relations?
7
When is a Riemannian manifold an open subset of a complete one?
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Exact short sequences of vector spaces
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Where does the generic triangle live?
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Heuristic explanation of why we lose projectives in sheaves.
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Side-Angle-Side Congruence and the Parallel Postulate
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