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BCnrd's user avatar
BCnrd's user avatar
BCnrd
  • Member for 14 years, 10 months
17 votes
Accepted

Complete intersections and flat families

17 votes
Accepted

Equivalence of ordered and unordered cech cohomology.

16 votes
Accepted

The order of the discriminant of a good-reduction elliptic curve

16 votes

What are examples illustrating the usefulness of Krull (i.e., rank > 1) valuations?

15 votes

Existence of fine moduli space for curves and elliptic curves

15 votes

Is $Sym^n (V^*) \cong Sym^n (V)^\ast$ naturally in positive characteristic?

15 votes
Accepted

Galois cohomology of linear groups over local fields

15 votes

Books on reductive groups using scheme theory

14 votes

When is a coarse moduli space also a fine moduli space?

14 votes

Semi-linear operators

13 votes

Modular curves of genus zero and normal forms for elliptic curves

13 votes
Accepted

What can we do with a coarse moduli space that we can't do with a DM moduli stack?

12 votes

Points of a variety defined by Galois descent

11 votes
Accepted

Quasi-separatedness for Algebraic Spaces

10 votes

Unipotent linear algebraic groups

10 votes

Does projectiveness descend along field extensions?

10 votes

Does a locally free sheaf over a product pushforward to a locally free sheaf?

10 votes
Accepted

Intuition for rational functions

10 votes
Accepted

components of E[p], E universal in char p.

10 votes
Accepted

How does one classify finite flat group schemes over a ring where p is nilpotent?

10 votes

What is an example of a regular realization of $C_5$ over $\mathbb{Q}(x)$?

9 votes
Accepted

Group Cohomology for Reductive Groups

9 votes

Is this true that algebraic spaces etale and surjective over a scheme is a scheme ?

9 votes
Accepted

Simplifying the definition of a geometric context using sieves?

9 votes
Accepted

Orientation of a smooth manifold using sheaves

9 votes
Accepted

Hyperspecial subgroup of a product of semisimple algebraic groups

8 votes

One dimensional (phi,Gamma)-modules in char p

8 votes
Accepted

If split algebraic groups are potentially isomorphic, are they isomorphic?

8 votes

Flatness of relative canonical bundle

8 votes

Is the category of affine schemes (over a fixed field) Cartesian closed?