User Theo Buehler

55 votes

Accepted

Freyd-Mitchell's embedding theorem

answered Nov 30, 2010 at 7:05

48 votes

Properly Discontinuous Action

answered Feb 24, 2011 at 6:10

41 votes

Accepted

Why the name 'separable' space?

answered Jan 8, 2011 at 22:35

34 votes

Accepted

Does there exist an isometry between $L^p$ and $l^p$?

answered Nov 18, 2012 at 17:57

29 votes

Accepted

If $f:R^n \to R$ is a smooth real-valued function such that $\nabla f : R^n \to R^n$ is a diffeomorphism, what can one conclude about the behavior of $f(x)$ at infinity?

answered Dec 4, 2010 at 7:02

27 votes

Accepted

What's an example of a locally presentable category "in nature" that's not $\aleph_0$-locally presentable?

answered Dec 12, 2010 at 21:50

23 votes

Information about publishing and citations

answered Apr 1, 2011 at 4:30

17 votes

Accepted

Non-regular Connected Hausdorff Banach Manifold

answered Aug 27, 2012 at 2:34

14 votes

Accepted

When do 0-preserving isometries have to be linear?

answered Apr 20, 2011 at 7:16

11 votes

Morphisms of Banach spaces

answered Feb 24, 2011 at 8:34

11 votes

Why are differential forms called closed and exact?

answered Dec 6, 2010 at 21:48

10 votes

Accepted

Sections of topological group extensions

answered Dec 24, 2010 at 9:54

10 votes

Are measurable homomorphisms $ (\Bbb{C},+) \to (\Bbb{C},+) $ or $ (\Bbb{C},+) \to (\Bbb{C},*) $ continuous, and do they admit an explicit description?

answered Mar 7, 2011 at 0:44

10 votes

Accepted

No injective groups with more than one element?

answered Jun 21, 2012 at 16:21

9 votes

Does a compact semilocally simply connected geodesic space have the homotopy type of a CW complex?

answered Jan 12, 2011 at 19:42

8 votes

Derived functor

answered Nov 30, 2010 at 9:31

7 votes

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Is anything known about the "closure" of an additive category by adding all the images and kernels?

answered Jan 23, 2011 at 1:12

6 votes

Accepted

Characterizations of amenable groups which use the space $\ell_1(G)$ and convolution

answered Dec 7, 2010 at 8:57

6 votes

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Nondifferentiability set of an arbitrary real function

answered Dec 15, 2010 at 5:51

6 votes

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Ergodic decomposition of quasi-invariant measure

answered Aug 24, 2011 at 15:31

6 votes

Accepted

separability of a certain space of continuous functions, II

answered Feb 2, 2011 at 17:59

5 votes

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On a decomposition of L^1(G)

answered Feb 27, 2011 at 5:27

5 votes

How to calculate the Feigenbaum constant to high precision?

answered Nov 26, 2010 at 12:30

5 votes

Accepted

On locally convex (and compactly generated) topological vector spaces

answered Jan 21, 2011 at 7:29

4 votes

Accepted

smooth cohomology of Lie groups

answered Jan 24, 2011 at 10:03

4 votes

Constructions unique up to non-unique isomorphism

answered Jan 30, 2011 at 14:41

4 votes

Accepted

quotient sigma-algebra on quotient space of locally compact groups

answered Dec 28, 2010 at 7:00

4 votes

When is the group of homeomorphisms of a compact space locally compact?

answered Dec 1, 2010 at 14:58

4 votes

When do isometric actions exist?

answered Feb 26, 2011 at 13:20

4 votes

Universal sets in metric spaces

answered Sep 23, 2012 at 12:45

Stack Exchange Network

36 Answers

Freyd-Mitchell's embedding theorem

Properly Discontinuous Action

Why the name 'separable' space?

Does there exist an isometry between $L^p$ and $l^p$?

If $f:R^n \to R$ is a smooth real-valued function such that $\nabla f : R^n \to R^n$ is a diffeomorphism, what can one conclude about the behavior of $f(x)$ at infinity?

What's an example of a locally presentable category "in nature" that's not $\aleph_0$-locally presentable?

Information about publishing and citations

Non-regular Connected Hausdorff Banach Manifold

When do 0-preserving isometries have to be linear?

Morphisms of Banach spaces

Why are differential forms called closed and exact?

Sections of topological group extensions

Are measurable homomorphisms $ (\Bbb{C},+) \to (\Bbb{C},+) $ or $ (\Bbb{C},+) \to (\Bbb{C},*) $ continuous, and do they admit an explicit description?

No injective groups with more than one element?

Does a compact semilocally simply connected geodesic space have the homotopy type of a CW complex?

Derived functor

Is anything known about the "closure" of an additive category by adding all the images and kernels?

Characterizations of amenable groups which use the space $\ell_1(G)$ and convolution

Nondifferentiability set of an arbitrary real function

Ergodic decomposition of quasi-invariant measure

separability of a certain space of continuous functions, II

On a decomposition of L^1(G)

How to calculate the Feigenbaum constant to high precision?

On locally convex (and compactly generated) topological vector spaces

smooth cohomology of Lie groups

Constructions unique up to non-unique isomorphism

quotient sigma-algebra on quotient space of locally compact groups

When is the group of homeomorphisms of a compact space locally compact?

When do isometric actions exist?

Universal sets in metric spaces