83

Answers
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7
Why is it a good idea to study a ring by studying its modules?
7
Set theory for category theory beginners
37
Order of an automorphism of a finite group
49
How do I check if a functor has a (left/right) adjoint?
20
What is the “right” definition of a ring?
13
triangulated vs. dg/A-infinity
5
“Points” in algebraic geometry: Why shift from m-Spec to Spec?
4
How to think about model categories?
4
What is an intuitive view of adjoints? (version 1: category theory)
2
Quotients of Schemes by Free Group Actions
24
How do I know the derived category is NOT abelian?
1
Are good introductory/pedagogical problems in algebraic geometry rare?
2
Are submersions of differentiable manifolds flat morphisms?
15
Pushouts in the Category of Schemes
8
Intuitive Example of a Jacobson Radical
3
When are GIT quotients projective?
2
Morphisms of (quasi-)projective varieties
4
Different definitions of the dimension of an algebra
5
Graded local rings versus local rings
4
Are quotients of polynomial rings almost UFDs?
3
Localization(s) of Categories
4
When does the sheaf direct image functor f_* have a right adjoint?
9
What is the relationship between t-structure and Torsion pair?
3
Some intuition behind the five lemma?
1
Is projectiveness a Zariski-local property of modules? (Answered: Yes!)
2
When are dual modules free?
3
What is interesting/useful about big Witt Vectors?
16
Why do people “forget” Verdier abelianization functor?(Looking for application)
6
Categories which are not compactly generated
17
What is the opposite category of the category of modules (or Hopf algebra representations)?
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