User Sergei Ivanov

17 votes

closed dual of vector fields

answered Sep 20, 2012 at 19:18

17 votes

Accepted

Do random projections (approximately) preserve convexity?

answered Sep 10, 2012 at 16:09

17 votes

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Are there unique geodesics in the NIL and SOL geometry?

answered Sep 29, 2010 at 17:46

16 votes

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Improvements of the Baire Category Theorem under (not CH)?

answered Apr 28, 2010 at 9:54

16 votes

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Monotonicity of Loewner ellipsoid?

answered Apr 10, 2013 at 18:19

15 votes

Accepted

Is a manifold with flat ends of bounded geometry?

answered Jan 15, 2013 at 23:44

15 votes

Accepted

A generalization of intermediate value theorem on R^k

answered Jan 16, 2013 at 17:39

15 votes

The sum of same powers of all matrices modulo p

answered Apr 7, 2013 at 20:21

15 votes

Accepted

Counting connected manifolds

answered May 16, 2010 at 22:06

15 votes

Why should I prefer bundles to (surjective) submersions?

answered Mar 11, 2010 at 19:23

15 votes

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Algebraicity of Eigenvectors in a Hilbert space

answered Dec 20, 2010 at 22:26

14 votes

Accepted

Point on a line nearest a point in Banach space

answered Jan 23, 2011 at 15:52

14 votes

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Space-discriminating injective curve

answered Nov 13, 2010 at 6:44

14 votes

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Mathematics of doodling and the winding number

answered Sep 16, 2011 at 11:03

14 votes

What is the definition of "canonical"?

answered Mar 28, 2010 at 20:58

14 votes

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How to construct a topological conjugacy?

answered Apr 3, 2010 at 20:32

14 votes

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Tverberg's theorem in CAT(0) spaces

answered Nov 29, 2013 at 22:27

13 votes

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What is the shape of the $n$-gon which gives the maximum of a function?

answered Jul 20, 2013 at 22:06

13 votes

Accepted

Almost constant bump function

answered Sep 17, 2012 at 12:42

13 votes

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A plausible inequality

answered Apr 2, 2010 at 18:45

13 votes

Is every finite group a group of "symmetries"?

answered Mar 27, 2010 at 20:03

13 votes

Accepted

Must a surface obtained by exponentiating a plane in a tangent space of a Riemannian manifold be geodesically convex?

answered Mar 13, 2010 at 23:01

13 votes

Fixed points of continuous involutions of the plane

answered Mar 14, 2010 at 19:32

13 votes

Accepted

Topological conjugacy between homeomorphisms and diffeomorphisms

answered May 26, 2010 at 19:31

13 votes

Locally complete space is topologically equivalent to a complete space

answered Apr 20, 2010 at 12:16

13 votes

Generalization of Borsuk-Ulam

answered Apr 9, 2011 at 22:37

13 votes

Accepted

A comparison question for non-positively curved disks

answered Jul 2, 2011 at 0:46

13 votes

Accepted

Isometric embedding a convex cap to render its boundary planar

answered Sep 26, 2011 at 16:47

13 votes

The Ramanujan Problems

answered May 17, 2011 at 13:41

13 votes

Polynomial positive on an interval

answered Sep 19, 2010 at 13:54

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227 Answers

closed dual of vector fields

Do random projections (approximately) preserve convexity?

Are there unique geodesics in the NIL and SOL geometry?

Improvements of the Baire Category Theorem under (not CH)?

Monotonicity of Loewner ellipsoid?

Is a manifold with flat ends of bounded geometry?

A generalization of intermediate value theorem on R^k

The sum of same powers of all matrices modulo p

Counting connected manifolds

Why should I prefer bundles to (surjective) submersions?

Algebraicity of Eigenvectors in a Hilbert space

Point on a line nearest a point in Banach space

Space-discriminating injective curve

Mathematics of doodling and the winding number

What is the definition of "canonical"?

How to construct a topological conjugacy?

Tverberg's theorem in CAT(0) spaces

What is the shape of the $n$-gon which gives the maximum of a function?

Almost constant bump function

A plausible inequality

Is every finite group a group of "symmetries"?

Must a surface obtained by exponentiating a plane in a tangent space of a Riemannian manifold be geodesically convex?

Fixed points of continuous involutions of the plane

Topological conjugacy between homeomorphisms and diffeomorphisms

Locally complete space is topologically equivalent to a complete space

Generalization of Borsuk-Ulam

A comparison question for non-positively curved disks

Isometric embedding a convex cap to render its boundary planar

The Ramanujan Problems

Polynomial positive on an interval