User Sergei Ivanov - MathOverflow

Sergei Ivanov

Member for 14 years, 1 month
Last seen more than a month ago

pdmi.ras.ru/~svivanov
Saint Petersburg, Russia

227 Answers

Score Activity Newest

6 votes

Vanishing Gaussian curvature

answered Mar 19, 2021 at 22:27

4 votes

Accepted

Convex bodies with symmetric shadows

answered Apr 1, 2019 at 0:15

3 votes

Broken geodesic in Finsler polyhedral space

answered Dec 2, 2018 at 14:41

5 votes

Accepted

Generalization of Radon's theorem

answered Feb 7, 2017 at 0:27

20 votes

Accepted

Is a left topological group which is a manifold a topological group?

answered Feb 23, 2014 at 12:36

11 votes

A Converse to the Gauss Bonnet Theorem

answered Feb 12, 2014 at 20:22

19 votes

Accepted

What kind of probability distribution maximizes the average distance between two points?

answered Dec 8, 2013 at 15:32

5 votes

Accepted

Preservation of injectivity radius

answered Dec 2, 2013 at 11:32

14 votes

Accepted

Tverberg's theorem in CAT(0) spaces

answered Nov 29, 2013 at 22:27

6 votes

Is equivalence of functions built from nested exponentiations a decidable problem?

answered Nov 21, 2013 at 21:16

3 votes

Accepted

Does such an operator commutes with the whole torus action?

answered Nov 8, 2013 at 17:20

12 votes

Accepted

A problem on infinite dimensional metric space

answered Oct 3, 2013 at 0:26

13 votes

Accepted

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

answered Jul 20, 2013 at 22:06

3 votes

Ball-Box Theorem and Sequence of Distributions

answered Jun 27, 2013 at 15:37

9 votes

Accepted

CAT(K) and Busemann

answered Jun 20, 2013 at 23:25

1 vote

Lipschitz parametrization of a symmetric convex curve

answered Jun 19, 2013 at 9:04

5 votes

Accepted

Stability of Pu's isosystolic inequality

answered Jun 18, 2013 at 11:37

4 votes

Tangent space to positive oriented Grassmannians

answered Jun 17, 2013 at 16:54

7 votes

Accepted

A question about how completely a rectifiable arc can fill a non-empty compact continuum that is the closure of its interior

answered Jun 14, 2013 at 16:39

5 votes

Accepted

Covering the annulus of d-cube

answered Jun 13, 2013 at 17:40

4 votes

Helly's number from biconvex functions

answered Jun 9, 2013 at 21:13

4 votes

Accepted

Zoll Flat Finsler tori and convex bodies on a starry night

answered Jun 5, 2013 at 16:44

4 votes

Accepted

Lower bound on $L^2$ norm of mean curvature in general dimensions

answered May 16, 2013 at 20:29

12 votes

Accepted

A characterization of Hilbert spaces?

answered May 12, 2013 at 22:16

3 votes

Accepted

Measuring the distance of a convex set from a ball (Nikodym distance)

answered May 6, 2013 at 18:35

7 votes

spectral radius monotonicity

answered May 5, 2013 at 22:18

16 votes

Accepted

Monotonicity of Loewner ellipsoid?

answered Apr 10, 2013 at 18:19

15 votes

The sum of same powers of all matrices modulo p

answered Apr 7, 2013 at 20:21

3 votes

Maximal cross sections of the Cartesian product of two planar domains

answered Apr 7, 2013 at 18:44

11 votes

Infimum of a finite number of distances in the plane

answered Apr 2, 2013 at 15:39

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