User user15464 - Mathematics Stack Exchange

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	3,330 reputation	bio	website		visits	member for	1 year, 8 months
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3

11

votes

1

answer

128

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Dolbeault Cohomology is invariant under homeomorphisms

jan 30 at 21:52 Henry T. Horton 7,419

2

10

votes

1

answer

109

views

Is it possible for a closed manifold to deformation retract onto a proper subset of itself?

algebraic-topology

dec 14 at 3:34 Olivier Bégassat 3,409

3

9

votes

1

answer

148

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If weak topology and weak* topology on $X^*$ agree, must $X$ be reflexive?

functional-analysis banach-spaces topological-vector-spaces

feb 4 at 9:55 Martin 3,678

9

votes

0

answers

92

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$A$ and $B$ commute on a dense set but $e^{iA}$ and $e^{iB}$ do not

functional-analysis operator-theory

jan 8 at 4:43 user15464 3,330

4

9

votes

3

answers

595

views

Inseparable, irreducible polynomials

field-theory galois-theory

apr 2 '12 at 4:46 Gerry Myerson 85.7k

5

9

votes

1

answer

252

views

The only 1-manifolds are $\mathbb R$ and $S^1$

general-topology manifolds

feb 28 '12 at 7:26 youler 176

3

9

votes

1

answer

616

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If $f$ is measurable and $fg$ is in $L^1$ for all $g \in L^q$, must $f \in L^p$?

functional-analysis measure-theory integration

sep 30 '11 at 2:04 robjohn♦ 59.2k

3

8

votes

2

answers

342

views

Quotient map from $\mathbb R^2$ to $\mathbb R$ with cofinite topology

general-topology

jun 26 at 17:45 francis-jamet 1,260

2

8

votes

1

answer

117

views

Group structure on $\mathbb R P^n$

algebraic-topology topological-groups

jun 21 '12 at 23:44 Juan S 4,665

2

7

votes

1

answer

254

views

Universal Cover of projective plane glued to Möbius strip

algebraic-topology covering-spaces

may 10 at 13:20 azimut 5,426

2

7

votes

2

answers

54

views

Two martingales whose distributions agree for each time have the same overall distribution

probability-theory stochastic-processes martingales

apr 23 at 9:17 Ben Derrett 1,583

2

7

votes

1

answer

67

views

Is the set of points in $\mathbb R^n$ with $\sum_{j=1}^n x_j^k = 0$ a submanifold?

differential-geometry

jan 23 at 1:30 Community♦ 1

1

7

votes

1

answer

171

views

A characterisation of quadratic extensions contained in cyclic extensions of degree 4

galois-theory

jan 11 at 12:39 mercio 11.2k

1

7

votes

1

answer

120

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Maximum distance between images of two points under an analytic function

complex-analysis

may 14 '12 at 19:59 Community♦ 1

2

7

votes

1

answer

136

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Best possible approximation by holomorphic functions

complex-analysis

dec 28 '11 at 5:25 Jonas Meyer 34.9k

6

votes

2

answers

82

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Fourier transform of $(1-\cos(tx))/x^2$

fourier-analysis

apr 27 at 1:57 Ron Gordon 25.9k

1

6

votes

2

answers

94

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Compositum of fields with trivial intersection

abstract-algebra field-theory galois-theory

mar 10 at 17:13 Jyrki Lahtonen 30.6k

6

votes

2

answers

62

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A group of linear isomorphisms of $\mathbb C^n$ must have an invariant subspace

linear-algebra group-theory representation-theory

jan 6 at 18:45 Mariano Suárez-Alvarez♦ 53k

3

6

votes

1

answer

347

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Isometric to Dual implies Hilbertable?

functional-analysis banach-spaces examples-counterexamples hilbert-spaces

feb 13 '12 at 10:38 Srivatsan 15.6k

1

6

votes

2

answers

176

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Removing a single point alters homology

algebraic-topology homology

feb 9 '12 at 11:58 Grumpy Parsnip 9,479

1

6

votes

1

answer

413

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Is every countable dense subset of $\mathbb R$ ambiently homeomorphic to $\mathbb Q$

real-analysis general-topology

dec 21 '11 at 3:50 user15464 3,330

6

votes

1

answer

1

kviews

A simpler proof of Jensen's inequality

real-analysis measure-theory inequality

nov 22 '11 at 19:12 Did 102k

5

votes

0

answers

31

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A non-integrable representation of the Heisenberg Algebra

representation-theory quantum-mechanics

jan 7 at 22:55 user15464 3,330

3

5

votes

2

answers

169

views

If a functor between categories of modules preserves injectivity and surjectivity, must it be exact?

abstract-algebra category-theory abelian-categories

jan 3 at 7:50 Zhen Lin 20.8k

1

5

votes

1

answer

65

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A vector bundle admits a local covariantly constant section iff it is flat

differential-geometry riemannian-geometry

dec 29 at 17:07 Sam 6,922

5

votes

2

answers

104

views

$ W_0^{1,p}$ norm bounded by norm of Laplacian

real-analysis inequality pde

dec 20 at 1:48 Community♦ 1

1

5

votes

1

answer

100

views

A Hölder-like inequality

functional-analysis inequality

jun 9 '12 at 10:24 Davide Giraudo 56k

2

5

votes

1

answer

113

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The ratio of two $L^p$ norms

measure-theory functional-analysis

may 6 '12 at 22:34 Julián Aguirre 14.6k

1

5

votes

2

answers

115

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Derivative of the measure of the set where $f > t$

measure-theory

apr 10 '12 at 21:46 Nate Eldredge 22.3k

1

5

votes

1

answer

263

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Subspace of $C_0(\mathbb R)$ contained in $L^2(\mathbb R)$

functional-analysis

feb 25 '12 at 10:42 Davide Giraudo 56k

user15464

151 Questions