Harry Gindi's user avatar
Harry Gindi's user avatar
Harry Gindi's user avatar
Harry Gindi
  • Member for 14 years, 5 months
  • Last seen more than 1 year ago
  • Edinburgh, UK
2 votes

Can we relate Cech cohomology and derived functor cohomology even when the cover we choose isn't nice?

3 votes

Definition of étale for rings

1 vote

When does the group of invertible ideal quotients = the free abelian group on the prime ideals?

3 votes
Accepted

A "join" of ω-categorical simplices

16 votes

Elementary / Interesting proofs of the Nullstellensatz

19 votes

Why must nilpotent elements be allowed in modern algebraic geometry?

2 votes

Giraud's proper base change for Gerbes - Elimination of Noetherian hypotheses

13 votes

Are equivalences of categories stable under filtered colimits?

1 vote

Are universally submersive morphisms of stacks universal descent morphisms for relative étale stacks?

4 votes

How does one rigorously lift a map $Sp \rightarrow Sp$ of spectra to equivariant spectra?

3 votes

Stacks for a string theory student

6 votes

What is the natural motivation for smooth/étale/unramified morphisms restricting from formally smooth/étale/unramified morphisms?

3 votes
Accepted

Morphisms of $\infty$-groupoids

16 votes

What is the cotangent complex good for?

13 votes

Why is it still common to not motivate results in publications?

5 votes
Accepted

Deligne's theorem for $n$-topos

5 votes

Theory of weak enrichment in higher categories

3 votes

Existence of finite limits of quasi-coherent modules on a scheme

7 votes

$\Theta$-Sets and Higher-QuasiCategories

2 votes
Accepted

Stabilizer $G_x$ of a $k$-valued point of an algebraic Stack

1 vote
Accepted

Whitehead Theorem in $\mathbb{A}^1$-homotopy theory

1 vote

Formally étale at all primes does not imply formally étale?

4 votes

What sort of object represents skyscaper sheaves on the etale site of $\mathbb{Z}_p$?

2 votes

Explaining the "free left fibration" functor for infinity categories

45 votes
Accepted

Category theory and set theory: just a different language, or different foundation of mathematics?

3 votes
Accepted

What can be an appropriate notion of principal bundle over a category (with an appropriate notion of local trivialisation)?

5 votes

Is $\mathcal{D} \bigl( \mathrm{QCoh}(\mathfrak{X}) \bigr)$ compactly generated?

4 votes
Accepted

What is the geometric realization of the the nerve of a fundamental groupoid of a space?

2 votes

Do disjoint unions of stacks commute with finite fibre products?

13 votes
Accepted

Why is $\mathbb{S}^1$ a cogroup object in $\mathbf{Top.}$?

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