User Sergei Ivanov

6 votes

Vanishing Gaussian curvature

answered Mar 19, 2021 at 22:27

6 votes

Accepted

is the closure of a totally convex set again totally convex?

answered Dec 3, 2010 at 23:12

6 votes

Existence of nonnegative solutions to an underdetermined system of linear equations

answered Mar 30, 2011 at 19:22

6 votes

Accepted

When can a 3-dimensional triangulation be isometricaly embedded in R^n?

answered Jun 22, 2011 at 20:59

6 votes

Determine if circle is covered by some set of other circles

answered Oct 3, 2011 at 23:15

6 votes

Is there Domain Invariance for Alexandrov spaces?

answered Apr 20, 2010 at 15:58

6 votes

Properties of the n-dimensional Stereographic Projection

answered May 19, 2010 at 18:51

6 votes

Accepted

Determinant of a metric?

answered May 19, 2010 at 20:39

6 votes

Accepted

Does IP = PSPACE work over other rings?

answered Apr 16, 2010 at 13:50

5 votes

Accepted

Sequence of constant rank matrices

answered Mar 5, 2010 at 21:02

5 votes

Centralizing four red vectors in six green sectors

answered May 16, 2010 at 7:48

5 votes

Accepted

Symmetric colorings of regular tessellations

answered Jun 22, 2010 at 23:29

5 votes

Sequential topological vector spaces

answered Aug 21, 2010 at 16:24

5 votes

Accepted

Integrability of distributions close to a given one.

answered Aug 30, 2010 at 10:09

5 votes

Fundamental polygons with infinite pairwise identifications

answered Sep 4, 2010 at 17:35

5 votes

A question about homeomorphic subsets of Hilbert space

answered Sep 5, 2010 at 16:23

5 votes

Accepted

Can one approximate "close" smooth functions?

answered Nov 16, 2011 at 20:27

5 votes

Accepted

Upper bound on the number of intersections of algebraic manifolds with affine planes

answered Nov 9, 2010 at 6:00

5 votes

How do maximum norms relatively change in Euclidean translations

answered Dec 13, 2010 at 12:34

5 votes

Hidden convexity

answered Feb 1, 2011 at 0:04

5 votes

Generating n-cycles

answered Sep 10, 2010 at 22:04

5 votes

Accepted

Covering the annulus of d-cube

answered Jun 13, 2013 at 17:40

5 votes

Accepted

Stability of Pu's isosystolic inequality

answered Jun 18, 2013 at 11:37

5 votes

Accepted

Generalization of Radon's theorem

answered Feb 7, 2017 at 0:27

5 votes

Accepted

Preservation of injectivity radius

answered Dec 2, 2013 at 11:32

4 votes

Tangent space to positive oriented Grassmannians

answered Jun 17, 2013 at 16:54

4 votes

Accepted

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

answered May 16, 2013 at 20:29

4 votes

Accepted

Zoll Flat Finsler tori and convex bodies on a starry night

answered Jun 5, 2013 at 16:44

4 votes

Helly's number from biconvex functions

answered Jun 9, 2013 at 21:13

4 votes

Accepted

Covering a $d$-dimensional integer lattice by repeating a minimal set of deterministic moves

answered Sep 25, 2012 at 23:16

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227 Answers

Vanishing Gaussian curvature

is the closure of a totally convex set again totally convex?

Existence of nonnegative solutions to an underdetermined system of linear equations

When can a 3-dimensional triangulation be isometricaly embedded in R^n?

Determine if circle is covered by some set of other circles

Is there Domain Invariance for Alexandrov spaces?

Properties of the n-dimensional Stereographic Projection

Determinant of a metric?

Does IP = PSPACE work over other rings?

Sequence of constant rank matrices

Centralizing four red vectors in six green sectors

Symmetric colorings of regular tessellations

Sequential topological vector spaces

Integrability of distributions close to a given one.

Fundamental polygons with infinite pairwise identifications

A question about homeomorphic subsets of Hilbert space

Can one approximate "close" smooth functions?

Upper bound on the number of intersections of algebraic manifolds with affine planes

How do maximum norms relatively change in Euclidean translations

Hidden convexity

Generating n-cycles

Covering the annulus of d-cube

Stability of Pu's isosystolic inequality

Generalization of Radon's theorem

Preservation of injectivity radius

Tangent space to positive oriented Grassmannians

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

Zoll Flat Finsler tori and convex bodies on a starry night

Helly's number from biconvex functions

Covering a $d$-dimensional integer lattice by repeating a minimal set of deterministic moves