User Adrián Barquero - Mathematics Stack Exchange

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	6,702 reputation	bio	website		visits	member for	2 years, 9 months
21342 badges		location	College Station, TX		seen	2 hours ago

1

7

votes

1

answer

286

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why does a certain formula in Lang's book on modular forms hold?

nov 22 '10 at 6:18 Matt E 57.5k

1

10

votes

2

answers

280

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Proof $\mathbb{A}^n$ is irreducible, without Nullstellensatz

reference-request algebraic-geometry representation-theory affine-geometry

feb 27 '12 at 15:47 Matt E 57.5k

4

10

votes

1

answer

273

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Limits in the category of exact sequences

category-theory abelian-categories

dec 9 '10 at 10:22 Buschi Sergio 52

4

10

votes

4

answers

272

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Spectrum of $R[x]$

reference-request algebraic-geometry commutative-algebra

jul 22 at 23:12 Lierre 2,872

3

5

votes

1

answer

269

views

Getting my number theoretic series straight

number-theory zeta-functions

dec 14 '10 at 17:33 J. M. 38.8k

2

12

votes

1

answer

268

views

Generality of the Manin-Drinfel'd theorem

number-theory

nov 27 '10 at 6:58 Jonas Kibelbek 3,627

4

11

votes

1

answer

261

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Field reductions

abstract-algebra field-theory

nov 28 '10 at 4:20 Arturo Magidin 158k

8

votes

2

answers

249

views

Why isn't there interest in nontrivial, nondiscrete topologies on finite groups?

general-topology group-theory soft-question finite-groups topological-groups

oct 19 at 4:50 sea turtles 690

5

10

votes

1

answer

249

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Concrete example of calculation of $\ell$-adic cohomology

algebraic-geometry

jul 21 at 21:43 YBL 811

4

10

votes

4

answers

247

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How to show that $\sum_{n=1}^{\infty} \frac{1}{(2n+1)(2n+2)(2n+3)}=\ln(2)-1/2$?

real-analysis sequences-and-series

apr 21 at 10:45 robjohn♦ 59k

10

16

votes

2

answers

242

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Qual question archives?

reference-request soft-question

nov 11 '11 at 18:47 Willie Wong♦ 30.6k

5

11

votes

1

answer

239

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If $u=\frac{1+\sqrt5}{2}$, then $u^3=2+\sqrt5$, but $u^2=\frac{3+\sqrt5}{2}$. What is the group that measures the power that makes units look nice?

terminology algebraic-number-theory

dec 4 '11 at 16:03 Zev Chonoles♦ 52.7k

2

14

votes

3

answers

234

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What does the topology on $\operatorname{Spec}(R)$ tells us about $R$?

general-topology commutative-algebra ring-theory

feb 11 at 2:15 Martin Brandenburg 22.1k

1

6

votes

1

answer

233

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Lattice of Gauss and Eisenstein Integers

number-theory algebraic-number-theory

mar 22 '11 at 18:23 quanta 5,008

2

7

votes

2

answers

217

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Is Nullstellensatz true for arbitrary fields if there aren't hidden points?

commutative-algebra

oct 13 at 4:31 Matt E 57.5k

6

15

votes

3

answers

217

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To what extent is the taylor polynomial the best polynomial approximation?

real-analysis analysis functional-analysis

feb 11 at 15:59 Hurkyl 21.5k

2

9

votes

3

answers

216

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Ring of holomorphic functions

complex-analysis commutative-algebra

mar 2 at 17:33 YACP 8,910

2

1

vote

4

answers

211

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Yet another inequality

real-analysis inequality

may 11 '11 at 20:23 Jonas Meyer 34.9k

1

4

votes

1

answer

204

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Intersection multiplicity of two curves.

algebraic-geometry

nov 20 at 19:39 Andrew 5,238

3

9

votes

3

answers

190

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Is every algebraic curve birational to a planar curve

algebraic-geometry riemann-surfaces algebraic-curves

jul 23 at 23:09 Pete L. Clark 44.3k

1

3

votes

2

answers

188

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Flatness of local rings

algebraic-geometry commutative-algebra

feb 2 '12 at 17:41 J. M. 38.8k

5

7

votes

1

answer

187

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Reference request: $L$-series and $\zeta$-functions

number-theory reference-request zeta-functions dirichlet-series

nov 6 '11 at 5:56 Matt E 57.5k

2

4

votes

1

answer

185

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Algorithms to compute the class number

number-theory

aug 22 '10 at 2:21 Pete L. Clark 44.3k

3

11

votes

2

answers

179

views

Does inclusion of a ring into a polynomial ring induce a closed map on prime spectra?

commutative-algebra

feb 15 '11 at 16:45 Pete L. Clark 44.3k

1

3

votes

2

answers

163

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Relationship between torsion modules and topology

soft-question terminology intuition general-topology modules

mar 27 at 10:51 azimut 5,366

2

1

vote

2

answers

163

views

prime decomposition in galois extensions

algebraic-number-theory

nov 18 '10 at 14:06 Community♦ 1

2

11

votes

2

answers

162

views

Writing $f(x,y)$ as $\Phi(g(x) + h(y))$

real-analysis

nov 29 '10 at 4:47 Jonas Kibelbek 3,627

2

6

votes

1

answer

162

views

Factorization of primes and $Spec(\mathcal{O}_K)$

algebraic-geometry algebraic-number-theory

mar 1 '11 at 13:02 user1728 199

3

4

votes

2

answers

149

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For what algebraic curves do rational points form a group?

group-theory number-theory algebraic-geometry rational-numbers

nov 1 at 19:02 franz lemmermeyer 1,494

1

2

votes

1

answer

148

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Finiteness of Dimension of $M_{k}(\Gamma)$

modular-forms

dec 26 '11 at 12:42 David Loeffler 2,828

Adrián Barquero

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