User Matt N. - Mathematics Stack Exchange

bio	website
	location
	age
visits	member for	2 years, 4 months
	seen	46 mins ago
stats	profile views	4,151

	15,275 reputation	bio	website		visits	member for	2 years, 4 months
32270 badges		location			seen	46 mins ago

2

3

votes

1

answer

137

views

Which of the following are compact sets?

jul 19 at 20:24 Davide Giraudo 56.2k

2

7

votes

1

answer

182

views

How many points does Stone-Čech compactification add?

general-topology compactness

jul 17 at 15:21 Temitope.A 482

5

15

votes

5

answers

568

views

Can two topological spaces surject onto each other but not be homeomorphic?

general-topology examples-counterexamples

jul 19 at 7:26 Community♦ 1

18

13

votes

4

answers

635

views

Best books in the genre “______ for Mathematicians”

reference-request big-list teaching

jul 9 at 1:00 PhD 162

37

40

votes

26

answers

2

kviews

Big List of Fun Math Books

big-list recreational-mathematics

aug 5 at 21:30 Fred Kline 373

1

5

votes

3

answers

118

views

Sequences in Non-Hausdorff Spaces

general-topology

jul 8 at 14:03 Niels Diepeveen 2,178

2

3

votes

1

answer

182

views

Infinite-dimensional translation-invariant measure

measure-theory

oct 23 at 20:56 tomasz 7,100

1

vote

3

answers

349

views

An introductory textbook on functional analysis and operator theory

reference-request functional-analysis operator-theory

feb 23 at 9:22 Mathemagician1234 3,744

2

votes

1

answer

130

views

What is meant by the Grothendieck group being the “best possible” construction of an abelian group from a commutative monoid?

group-theory commutative-algebra category-theory

jul 23 at 11:22 Matt N. 15.3k

1

4

votes

2

answers

153

views

Example of profinite groups

topological-groups

jul 4 at 17:33 Akhil Mathew 16.2k

2

7

votes

4

answers

619

views

Sequence in $C[0,1]$ with no convergent subsequence

real-analysis analysis metric-spaces

jun 17 '12 at 10:00 Martin Sleziak 20.3k

2

5

votes

3

answers

758

views

A question about Banach reflexive space

functional-analysis banach-spaces

mar 26 at 8:07 Seirios 8,917

1

4

votes

2

answers

231

views

Why metrizable group requires continuity of inverse?

real-analysis abstract-algebra general-topology group-theory topological-groups

jul 19 at 18:42 Martin Sleziak 20.3k

3

votes

1

answer

239

views

linear subspace of dual space

functional-analysis locally-convex-spaces

nov 29 at 14:12 t.b. 43.1k

1

3

votes

2

answers

140

views

Why is that $\widehat{\mathbb{R}/\mathbb{Z}}\cong\mathbb{Z}$?

topological-groups

may 22 '12 at 12:38 M Turgeon 4,541

1

2

votes

2

answers

238

views

Finitely generated projective module

commutative-algebra modules

nov 20 at 6:43 Matt N. 15.3k

1

5

votes

1

answer

313

views

Definition of a finitely generated $k$ - algebra

commutative-algebra

may 20 '12 at 12:38 Martin Brandenburg 22.5k

1

3

votes

1

answer

135

views

A homomorphism between finite free modules over a local ring

commutative-algebra

may 20 '12 at 8:25 wxu 2,781

26

84

votes

1

answer

2

kviews

Does the open mapping theorem imply the Baire category theorem?

functional-analysis set-theory banach-spaces axiom-of-choice baire-category

dec 10 at 23:50 Pedro Lauridsen Ribeiro 37

1

2

votes

1

answer

313

views

How to show multiplication and inversion are continuous in this topology on $C(X)$?

general-topology

may 18 '12 at 19:54 Robert Israel 86.3k

1

vote

1

answer

217

views

The norm-closed unit ball of $c_0$ is not weakly compact

functional-analysis

may 18 '12 at 17:07 David Mitra 41.1k

13

19

votes

1

answer

493

views

Homeomorphism preserving distance

general-topology metric-spaces

may 22 '12 at 13:51 Matt N. 15.3k

1

vote

2

answers

191

views

Norm-preserving map is linear

functional-analysis vector-spaces normed-spaces

may 17 '12 at 12:35 Matt N. 15.3k

1

5

votes

2

answers

127

views

Problem connecting Topology and Algebra via Analysis

abstract-algebra general-topology analysis

may 19 '12 at 14:22 Sam 6,944

2

4

votes

4

answers

287

views

A property of a separable space

general-topology

may 16 '12 at 20:26 Nate Eldredge 22.4k

3

votes

6

answers

778

views

Where do I start with self learning linear algebra

reference-request linear-algebra

may 16 '12 at 19:47 Amihai Zivan 1,083

2

4

votes

2

answers

229

views

Noetherian and Artinian modules

modules

jul 21 at 16:01 Matt N. 15.3k

7

17

votes

4

answers

515

views

Is there a $\sigma$-algebra on $\mathbb{R}$ strictly between the Borel and Lebesgue algebras?

real-analysis measure-theory descriptive-set-theory

jul 23 at 1:13 Asaf Karagila 90.9k

3

4

votes

1

answer

220

views

Isomorphic $R$-modules

abstract-algebra commutative-algebra modules

may 7 '12 at 8:03 Zhen Lin 20.9k

2

3

votes

0

answers

262

views

An application of Riesz Representation Theorem

measure-theory

may 8 '12 at 7:57 Matt N. 15.3k

Matt N.

386 Favorites