User Kevin Buzzard

5 votes

Compact simple simply connected algebraic groups over $Q_p$ or other local non-archimedean fields

answered Jun 16, 2010 at 9:03

5 votes

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

answered Jan 2, 2010 at 22:51

5 votes

What's so great about blackboards?

answered Nov 18, 2009 at 22:59

5 votes

Accepted

Infinite sets of primes of density 0

answered Mar 2, 2010 at 12:22

5 votes

When is a homogeneous space a variety?

answered Mar 4, 2010 at 16:42

5 votes

Erratum for Cassels-Froehlich

answered Jan 11, 2010 at 16:31

5 votes

Image of complex conjugation by modular representations in characteristic 2

answered Oct 20, 2011 at 18:13

5 votes

Quotients of Tate modules

answered May 18, 2012 at 6:48

5 votes

Textbook recommendations for undergraduate proof-writing class

answered Apr 22, 2011 at 20:31

5 votes

Accepted

Proof in Schemmel's Paper

answered Jan 16, 2017 at 22:12

5 votes

Accepted

Conditions of solution

answered Jan 10, 2017 at 18:08

4 votes

Accepted

Are Fredholm hypersurfaces affinoid?

answered Jan 5, 2017 at 20:31

4 votes

Accepted

Does the inverse limit of complexes with bounded cohomology have a bounded cohomology?

answered Jan 17, 2017 at 22:07

4 votes

Accepted

Galois group of an L-function

answered Jan 12, 2017 at 15:48

4 votes

Errata for Atiyah–Macdonald

answered Sep 23, 2020 at 13:46

4 votes

Accepted

Base Change for Eigenvarieties

answered Jun 20, 2011 at 21:07

4 votes

Accepted

How can I evaluate the sum $\sum_{a+b=1;\ a,b \in \mathbb F_p} \left(\frac{a}{p}\right) \chi(b)$ where $\chi$ is a multiplicative character of $\mathbb F_p^{*}$ of order three?

answered Sep 23, 2011 at 20:38

4 votes

Accepted

Image of a hyperspecial subgroup hyperspecial?

answered Feb 12, 2010 at 23:43

4 votes

Elementary proof that projective space is a quotient

answered Feb 23, 2010 at 12:04

4 votes

SL(2,Z/N)-decomposition of space of cusp forms for Gamma(N)

answered Nov 9, 2009 at 20:20

4 votes

Modular forms reference

answered Oct 31, 2009 at 20:24

4 votes

Semisimple Weil-Deligne representations

answered Mar 26, 2011 at 16:41

3 votes

Representations of reductive groups over arbitrary fields

answered Nov 19, 2010 at 19:20

3 votes

Accepted

Abelian varieties of CM type?

answered Apr 28, 2010 at 15:05

3 votes

Is there a schemetical construction for modular curves over the rationals?

answered Apr 18, 2010 at 20:18

3 votes

Examples and intuition for arithmetic schemes

answered Nov 2, 2009 at 11:07

3 votes

Splitting lemma under assumption of the axiom of choice

answered Nov 15, 2009 at 22:29

3 votes

How many L-values determine a modular form?

answered Dec 16, 2009 at 18:25

3 votes

Version of Brauer-Nesbitt for summands

answered Nov 23, 2009 at 17:00

3 votes

Does Ribet's level lowering theorem hold for prime powers?

answered Nov 20, 2009 at 7:12

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218 Answers

Compact simple simply connected algebraic groups over $Q_p$ or other local non-archimedean fields

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

What's so great about blackboards?

Infinite sets of primes of density 0

When is a homogeneous space a variety?

Erratum for Cassels-Froehlich

Image of complex conjugation by modular representations in characteristic 2

Quotients of Tate modules

Textbook recommendations for undergraduate proof-writing class

Proof in Schemmel's Paper

Conditions of solution

Are Fredholm hypersurfaces affinoid?

Does the inverse limit of complexes with bounded cohomology have a bounded cohomology?

Galois group of an L-function

Errata for Atiyah–Macdonald

Base Change for Eigenvarieties

How can I evaluate the sum $\sum_{a+b=1;\ a,b \in \mathbb F_p} \left(\frac{a}{p}\right) \chi(b)$ where $\chi$ is a multiplicative character of $\mathbb F_p^{*}$ of order three?

Image of a hyperspecial subgroup hyperspecial?

Elementary proof that projective space is a quotient

SL(2,Z/N)-decomposition of space of cusp forms for Gamma(N)

Modular forms reference

Semisimple Weil-Deligne representations

Representations of reductive groups over arbitrary fields

Abelian varieties of CM type?

Is there a schemetical construction for modular curves over the rationals?

Examples and intuition for arithmetic schemes

Splitting lemma under assumption of the axiom of choice

How many L-values determine a modular form?

Version of Brauer-Nesbitt for summands

Does Ribet's level lowering theorem hold for prime powers?