David Brown

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Name David Brown
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Math grad student at Berkeley, with a taste for number theory and algebraic geometry.
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Constructing a degeneration (as a group scheme) of G_m to G_a

nov 3 at 14:45 Anton Geraschenko♦♦ 5,348●1●12●43

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Is the Torelli map an immersion?

dec 19 at 18:15 VA 2,579●4●16

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19
Advice on doing mathematical research (2)
19
Do good math jokes exist? (2)
19
Global fields: What exactly is the analogy between number fields and function fields?
17
Good introductory references on algebraic stacks?
8
Examples of algebraic stacks without coarse moduli space?
8
Are Jacobians principally polarized over non-algebraically closed fields?
7
When is a coarse moduli space also a fine moduli space?
7
When is an algebraic space a scheme? (2)
6
What is the affinization of M_g?
6
Is there a universal property for Witt vectors?
5
Coarse moduli spaces over Z and F_p
4
Legitimacy of reducing mod p a complex multiplication action of an elliptic curve?
4
What is the Theorem of the Cube?
4
Simplicial objects
4
What is an example of a topological space that is not homotopy equivalent to a CW-complex?
4
Is there a high-concept explanation for why characteristic 2 is special?
4
Is S_6 the automorphism group of a group?
4
A learning roadmap for algebraic geometry
3
“Albanese” schemes: When does an “initial abelian scheme” exist under a given scheme?
3
What’s a groupoid? What’s a good example of a groupoid?
3
Weil-Châtelet group
3
Is very ampleness of a divisor on a curve determined entirely by degree and genus?
3
Examples of great mathematical writing
3
Existence of (smooth) models
3
Galois Groups vs. Fundamental Groups
3
supersingular elliptic curves
3
colimits of schemes
3
Degrees of etale covers of stacks
3
hard diophantine equation
2
Looking for reference talking about relationship between descent theory and cohomological descent
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