David Zureick-Brown

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Name	David Zureick-Brown
Member for	3 years
Seen	yesterday
Website	mathcs.emory.edu/~dzb
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I'm an arithmetic geometer at Emory University.

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Where can I find a comprehensive list of equations for small genus modular curves?

dec 20 10 at 17:02 AVS 560●3●8

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614

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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?

ag.algebraic-geometry schemes deformation-theory

may 5 11 at 17:02 David Zureick-Brown♦ 6,064●10●41

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653

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Equivalence of ordered and unordered cech cohomology.

sheaf-theory cohomology homological-algebra reference-request at.algebraic-topology

oct 6 10 at 14:14 Tyler Lawson 18.7k●2●44●91

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435

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Existence of points on varieties which avoid a given number field.

ag.algebraic-geometry nt.number-theory arithmetic-geometry rational-points

jun 12 at 7:26 Olivier Benoist 2,716●10●18

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499

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Constructing a degeneration (as a group scheme) of G_m to G_a

algebraic-groups schemes examples

nov 3 09 at 14:45 Anton Geraschenko♦♦ 13.7k●3●48●108

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719

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Is there an example of a variety over the complex numbers with no embedding into a smooth variety?

examples ag.algebraic-geometry schemes smoothness

apr 27 10 at 15:02 gummi 181●3

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566

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Is there an example of a scheme X whose reduction X_red is affine but X is not affine?

ag.algebraic-geometry examples

oct 5 09 at 0:19 David Rydh 1,903●7●15

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Examples of rational families of abelian varieties.

abelian-varieties ag.algebraic-geometry examples

jan 26 12 at 4:24 David Zureick-Brown♦ 6,064●10●41

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740

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Are Jacobians principally polarized over non-algebraically closed fields?

abelian-varieties ag.algebraic-geometry moduli-spaces jacobians

feb 13 10 at 9:14 BCnrd 4,116●1●38●58

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716

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Cech to derived spectral sequence and sheafification

cohomology ag.algebraic-geometry

mar 28 11 at 8:11 Oren Ben-Bassat 632●4●10

Answers

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Do good math jokes exist? (2)

Global fields: What exactly is the analogy between number fields and function fields?

Good introductory references on algebraic stacks?

Advice on doing mathematical research (2)

Has anyone thought about creating a formal proof wiki with verifier?

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

Are Jacobians principally polarized over non-algebraically closed fields?

Examples of algebraic stacks without coarse moduli space?

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?

Simplicial objects

Stacks in modern number theory/arithmetic geometry

For which composite $N$ does $X_0(N)$ possess a non-cuspidal rational point?

What is the inverse image sheaf necessary for in algebraic geometry?

Is there a universal property for Witt vectors?

Is S_6 the automorphism group of a group?

Examples of great mathematical writing

Is there a high-concept explanation for why characteristic 2 is special?

What is the affinization of M_g?

When is an algebraic space a scheme? (2)

Legitimacy of reducing mod p a complex multiplication action of an elliptic curve?

Coarse moduli spaces over Z and F_p

Local structure of Deligne-Mumford stacks

Fields obtained by adjoining x coordinates of torsion points on elliptic curves

Looking for reference talking about relationship between descent theory and cohomological descent

What is an example of a topological space that is not homotopy equivalent to a CW-complex?

Undergraduate Level Math Books

A learning roadmap for algebraic geometry

What’s a groupoid? What’s a good example of a groupoid?

Weil-Châtelet group

Is very ampleness of a divisor on a curve determined entirely by degree and genus?

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David Zureick-Brown

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Questions

Where can I find a comprehensive list of equations for small genus modular curves?

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?

Equivalence of ordered and unordered cech cohomology.

Existence of points on varieties which avoid a given number field.

Constructing a degeneration (as a group scheme) of G_m to G_a

Is there an example of a variety over the complex numbers with no embedding into a smooth variety?

Is there an example of a scheme X whose reduction X_red is affine but X is not affine?

Examples of rational families of abelian varieties.

Are Jacobians principally polarized over non-algebraically closed fields?

Cech to derived spectral sequence and sheafification

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