58

Answers
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48
Do good math jokes exist? (2)
32
Global fields: What exactly is the analogy between number fields and function fields?
24
Good introductory references on algebraic stacks?
22
Advice on doing mathematical research (2)
14
Has anyone thought about creating a formal proof wiki with verifier?
11
When is a coarse moduli space also a fine moduli space?
11
Are Jacobians principally polarized over non-algebraically closed fields?
10
Examples of algebraic stacks without coarse moduli space?
10
What is an explicit example of a variety X which is finite over Spec F_p but which does not lift to a scheme Y which is finite and flat over Spec Z_p?
10
Simplicial objects
9
Stacks in modern number theory/arithmetic geometry
8
For which composite $N$ does $X_0(N)$ possess a non-cuspidal rational point?
8
What is the inverse image sheaf necessary for in algebraic geometry?
8
Is there a universal property for Witt vectors?
8
Is S_6 the automorphism group of a group?
7
Examples of great mathematical writing
7
Is there a high-concept explanation for why characteristic 2 is special?
7
What is the affinization of M_g?
7
When is an algebraic space a scheme? (2)
7
Legitimacy of reducing mod p a complex multiplication action of an elliptic curve?
7
Coarse moduli spaces over Z and F_p
7
Local structure of Deligne-Mumford stacks
5
Fields obtained by adjoining x coordinates of torsion points on elliptic curves
5
Looking for reference talking about relationship between descent theory and cohomological descent
5
What is an example of a topological space that is not homotopy equivalent to a CW-complex?
5
Undergraduate Level Math Books
5
A learning roadmap for algebraic geometry
4
What’s a groupoid? What’s a good example of a groupoid?
4
Weil-Châtelet group
4
Is very ampleness of a divisor on a curve determined entirely by degree and genus?
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