Igor Belegradek's user avatar
Igor Belegradek's user avatar
Igor Belegradek's user avatar
Igor Belegradek
  • Member for 14 years, 5 months
  • Last seen this week
10 votes

Contractibility of space of embeddings of a disc

10 votes

Are negatively pinched manifold locally conformally flat?

10 votes

Is every (finite) group action on R^n by diffeomorphisms conjugate to a linear action?

10 votes

Status of Hilbert-Smith conjecture and H-S conjecture for Hölder actions

10 votes

What to look for in applicants to graduate programs (in mathematics)?

10 votes

Poincaré Theorem on presentation from a fundamental polyhedra

10 votes

Why do finite homotopy groups imply finite homology groups?

10 votes
Accepted

Isometries between spherical space forms

10 votes
Accepted

Five-dimensional manifolds fibering over a fixed hyperbolic surface

10 votes
Accepted

Hausdorff vs Gromov-Hausdorff convergence of convex hypersurfaces

10 votes
Accepted

Gromov-Hausdorff limits of 2-dimensional Riemannian surfaces

10 votes
Accepted

Counterexamples to an analog of Cannon's Conjecture which do not arise from manifolds?

9 votes

Computation on characteristic classes

9 votes

When a compact topological manifold with boundary is a ball?

9 votes

Producing non-trivial homotopy classes in $\infty$-dimensional vector spaces by removing points

9 votes
Accepted

Is $\mathbb{R}^\omega \cong (\mathbb{R}^\omega \setminus \{x\})$?

9 votes

When do two holonomy maps determine flat bundles that are isomorphic as just bundles (w/o regard to the flat connections)?

9 votes

Cohomology classes annihilated by pullbacks

9 votes

Are fundamental groups of aspherical manifolds Hopfian?

9 votes

Riemannian metric induced by a metric

9 votes

Lie groups admitting flat (bi)invariant metrics.

9 votes
Accepted

More four-dimensional counterexamples

9 votes
Accepted

An elementary question about the cut locus

9 votes

Why study Lie algebras?

9 votes
Accepted

Fibrewise homotopy-equivalence of unit sphere bundles vs isomorphism of tangent bundles

9 votes

Are there some tables or handbooks of homology and homotopy groups of every manifold which has been calculated?

9 votes
Accepted

Closed manifold has no nontrivial totally convex subset?

9 votes
Accepted

Totally non parallelizable manifold

9 votes
Accepted

Can an open manifold with positive Ricci curvature be non simply connected at infinity?

9 votes

Is every connected metrizable locally path connected space a length space?

1 2 3
4
5
8