User Juan S - Mathematics Stack Exchange

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visits	member for	2 years, 7 months
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	4,665 reputation	bio	website		visits	member for	2 years, 7 months
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5

25

votes

1

answer

439

views

Homology of cube with a twist

algebraic-topology

apr 4 '11 at 14:38 Grumpy Parsnip 9,589

4

15

votes

1

answer

352

views

Decomposition of a manifold

dec 17 '11 at 3:12 t.b. 43.2k

1

9

votes

2

answers

620

views

Short Exact Sequences & Rank Nullity

abstract-algebra group-theory modules homological-algebra

oct 31 at 11:23 Leon Lampret 2,630

3

9

votes

1

answer

272

views

Derived functor of a derived functor

homological-algebra derived-functors

apr 2 '12 at 0:00 t.b. 43.2k

2

9

votes

1

answer

319

views

Homology of punctured projective space

algebraic-topology

jun 3 '11 at 7:39 Community♦ 1

1

8

votes

1

answer

504

views

Visualising regular CW complex

algebraic-topology

apr 4 '11 at 8:20 Ryan Budney 13.3k

2

7

votes

1

answer

119

views

The Picard-Brauer short exact sequence

reference-request commutative-algebra ring-theory

jan 17 at 2:03 Matt 2,704

1

7

votes

4

answers

182

views

Show that $\sqrt{1+t}$ lies in $\mathbb{Z}[1/2][\![t]\!]$

abstract-algebra

oct 12 at 1:37 KCd 5,990

3

7

votes

3

answers

495

views

Spectral Sequence proof of the five lemma

homological-algebra spectral-sequences

sep 21 '11 at 6:22 Mariano Suárez-Alvarez♦ 53.4k

1

6

votes

2

answers

128

views

Restriction of scalars and tensor product

commutative-algebra modules tensor-products

feb 1 at 5:34 Barbara Osofsky 915

3

6

votes

0

answers

142

views

A spectral sequence for Tor

homological-algebra spectral-sequences

jun 29 at 4:11 Juan S 4,665

1

6

votes

1

answer

170

views

An example of a Grothendieck topology

abstract-algebra topos-theory

mar 13 '12 at 7:25 Zhen Lin 21.1k

2

6

votes

1

answer

334

views

Understanding the canonical line bundle $H$, and the fact that $(H \otimes H)\oplus 1 \simeq H \oplus H$

vector-bundles

jan 31 '12 at 20:30 David Speyer 18.7k

1

6

votes

1

answer

71

views

Relationship between $\operatorname{Ad}$ and $\operatorname{ad}$

combinatorics lie-groups

dec 3 '11 at 6:27 Juan S 4,665

1

5

votes

1

answer

171

views

Pontrjagin square (Mosher and Tangora Question)

algebraic-topology

jul 31 '11 at 0:43 Juan S 4,665

2

5

votes

1

answer

417

views

References for calculating cohomology rings

reference-request algebraic-topology cohomology

may 12 '11 at 7:36 Juan S 4,665

1

5

votes

1

answer

375

views

CW complex of a product

algebraic-topology

may 7 '11 at 4:50 Community♦ 1

2

5

votes

1

answer

246

views

Topological K-theory references

reference-request topological-k-theory

apr 22 '11 at 13:47 Raeder 1,162

5

votes

1

answer

167

views

Adjunction space is a pushout

general-topology category-theory

mar 20 '11 at 6:27 Henno Brandsma 9,862

1

4

votes

1

answer

64

views

Product of affine schemes

algebraic-geometry

apr 26 '12 at 3:27 Michael Joyce 7,058

2

4

votes

1

answer

171

views

The definition of a complex oriented cohomology theory

algebraic-topology

feb 17 '12 at 5:52 Sean Tilson 2,453

1

4

votes

0

answers

124

views

Steenrod Algebra - Converting between Milnor to Serre-Cartan basis'

algebraic-topology cohomological-operations

aug 25 '11 at 7:27 Juan S 4,665

3

4

votes

1

answer

557

views

Tensor Product of Vector Bundles

vector-bundles

jul 8 '11 at 19:49 Pete L. Clark 44.7k

4

votes

2

answers

323

views

Cohomology ring of a product

algebraic-topology cohomology

jun 15 '11 at 3:21 Joe Johnson 126 5,482

1

4

votes

1

answer

111

views

Ring structure of K-theory of a wedge of spheres

algebraic-topology ring-theory topological-k-theory

jun 9 '11 at 19:31 Grigory M 7,077

4

votes

3

answers

303

views

What is $\mbox{Hom}(\mathbb{Z}/2,\mathbb{Z}/n)$?

abstract-algebra

may 10 '11 at 8:17 Shahab 2,397

4

votes

1

answer

346

views

Group objects in category of groups

category-theory

apr 18 '11 at 2:52 Alex B. 11.9k

1

4

votes

1

answer

125

views

$H_p(\mathbb{R}P^3 \times \mathbb{R}P^2)$

algebraic-topology

apr 13 '11 at 13:47 Grumpy Parsnip 9,589

4

votes

2

answers

196

views

Tensor product of abelian group and a free abelian group

abstract-algebra homological-algebra

apr 13 '11 at 1:02 Juan S 4,665

1

4

votes

0

answers

147

views

$T \times S^1$ and $K \times S^1$ (a question from Hatcher)

algebraic-topology

apr 1 '11 at 4:27 Juan S 4,665

Juan S

90 Questions