User J. GE

25 votes

10 answers

11k views

Commutator subgroup does not consist only of commutators?

asked Oct 30, 2010 at 19:32

7 votes

1 answer

2k views

Details of Perelman's example about soul of Alexandrov space

asked Apr 21, 2010 at 19:50

6 votes

1 answer

938 views

Normal bundle of $CP^n$ in $CP^{n+1}$

asked Feb 10, 2010 at 4:47

6 votes

1 answer

288 views

Is the Lipschitz unique for close Alexandrov space other than dimension 4?

asked Feb 2, 2012 at 16:36

5 votes

3 answers

3k views

Topological description of Manifold with boundary

asked Feb 12, 2010 at 5:39

4 votes

2 answers

838 views

Soul theorem for non-negativly curved open Alexandrov manifolds?

asked Feb 17, 2010 at 19:11

4 votes

1 answer

540 views

Can two Riemannian manifolds (dim≠4) be homeomorphic without being bi-Lipschitz homeomorphic?

asked Mar 30, 2010 at 21:31

4 votes

0 answers

616 views

Cheeger's Finiteness Theorem and Lipschitz Constant

asked Feb 8, 2012 at 21:42

4 votes

2 answers

152 views

Normalized packing number

asked Dec 12, 2013 at 14:35

3 votes

1 answer

309 views

Is the space of directions an inner metric space for inner metric space of curvature $\ge k$?

asked Mar 7, 2012 at 1:59

3 votes

1 answer

318 views

Is Level set of Regular functions in Alexandrov spaces again an Alex. space?

asked Mar 1, 2010 at 22:08

3 votes

1 answer

381 views

Does convex hypersurface necessarily bound a convex domain?

asked May 15, 2015 at 14:06

3 votes

3 answers

311 views

Existence of sequence of examples of braking 'Cancellation law in homeomorphic products'

asked Apr 11, 2011 at 21:15

2 votes

2 answers

594 views

Must a Strong deformation retractible 3-manifold be homeomorphic to $\mathbb{R}^3$?

asked Feb 12, 2010 at 5:34

2 votes

1 answer

167 views

Is the total space of Fiber bundle bordant to 0 if the fiber is null bordant?

asked Mar 22, 2011 at 21:50

2 votes

1 answer

395 views

References for the categories: DIFF PL LIP TOP

asked Feb 6, 2012 at 16:01

2 votes

0 answers

305 views

Metric structure and Differentiable structure on spheres.

asked Jun 13, 2012 at 15:58

1 vote

1 answer

407 views

Extension of groups in Bieberbach's theorem

asked Sep 5, 2012 at 13:52

1 vote

0 answers

308 views

Smooth structures on quotient space

asked Dec 5, 2013 at 12:12

1 vote

1 answer

193 views

$\hat{A}$ genus of total space of fiber bundle

asked May 7, 2012 at 3:22

1 vote

0 answers

119 views

Stability for open manifolds of finite volume under lower Ricci curvature bound

asked Jan 14, 2016 at 17:55

0 votes

1 answer

152 views

Entropy of Negatively pinched manifolds

asked Feb 17, 2014 at 15:23

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22 Questions

Commutator subgroup does not consist only of commutators?

Details of Perelman's example about soul of Alexandrov space

Normal bundle of $CP^n$ in $CP^{n+1}$

Is the Lipschitz unique for close Alexandrov space other than dimension 4?

Topological description of Manifold with boundary

Soul theorem for non-negativly curved open Alexandrov manifolds?

Can two Riemannian manifolds (dim≠4) be homeomorphic without being bi-Lipschitz homeomorphic?

Cheeger's Finiteness Theorem and Lipschitz Constant

Normalized packing number

Is the space of directions an inner metric space for inner metric space of curvature $\ge k$?

Is Level set of Regular functions in Alexandrov spaces again an Alex. space?

Does convex hypersurface necessarily bound a convex domain?

Existence of sequence of examples of braking 'Cancellation law in homeomorphic products'

Must a Strong deformation retractible 3-manifold be homeomorphic to $\mathbb{R}^3$?

Is the total space of Fiber bundle bordant to 0 if the fiber is null bordant?

References for the categories: DIFF PL LIP TOP

Metric structure and Differentiable structure on spheres.

Extension of groups in Bieberbach's theorem

Smooth structures on quotient space

$\hat{A}$ genus of total space of fiber bundle

Stability for open manifolds of finite volume under lower Ricci curvature bound

Entropy of Negatively pinched manifolds