J. GE's user avatar
J. GE's user avatar
J. GE's user avatar
J. GE
  • Member for 14 years, 5 months
  • Last seen more than 1 year ago
  • BNU, Beijing
28 votes
1 answer
2k views

Example of 4-manifold with $\pi_1=\mathbb Q$

16 votes
2 answers
2k views

Is "Notices of the American Mathematical Society" available before 1995?

13 votes
3 answers
825 views

Are negatively pinched manifold locally conformally flat?

12 votes
0 answers
1k views

Are there exotic $S^2\times S^2$?

11 votes
3 answers
1k views

Is there any general index theorem for manifold with boundary?

11 votes
2 answers
410 views

Does combinatorial formula for the Pontrjagin classes exist?

11 votes
2 answers
668 views

Does positively curved sphere admit an isometric embedding as hypersurface in Euclidean space?

10 votes
2 answers
1k views

What are first eigenfunctions of Laplacian for $CP^n$ with Fubini-Study metric?

9 votes
2 answers
357 views

Is compact flat manifold cusp cross-sections of a complete finite volume hyperbolic manifold?

9 votes
1 answer
332 views

Positively curved manifold with almost extreme diameter

8 votes
2 answers
1k views

Additivity of Signature

8 votes
0 answers
392 views

Exhaustion of an open manifold of bounded curvature and finite volume

8 votes
2 answers
790 views

Examples for open disc bundle which is not vector bundle

8 votes
2 answers
807 views

Any text book or lecture notes regarding the algebraic part of geometry?

7 votes
1 answer
923 views

Cancellation law for $M^n\times \mathbb R= N^n\times \mathbb R$.

7 votes
2 answers
448 views

Does closed Alexandrov space admit a bi-Lipschitz embedding into $\mathbb R^N$?

7 votes
2 answers
399 views

Examples of homology sphere that bound a nonsmoothable contractible 4-manifold

6 votes
0 answers
147 views

Is every geodesic space with non-positively curved metric triangulable?

6 votes
0 answers
176 views

Isometric embedding of regular simplex into Riemannian manifold

5 votes
1 answer
591 views

Are there any fake 3-tori?

4 votes
1 answer
2k views

Totally geodesic submanifold of round sphere

4 votes
1 answer
336 views

Cone structures on $\mathbb R^n$

3 votes
1 answer
169 views

Closed surface with uncountably many conic points?

3 votes
1 answer
360 views

Classify $\mathbb{R}^n$-bundles

3 votes
1 answer
484 views

Diameter estimate of distance sphere of positive curved manifold

2 votes
0 answers
131 views

Möbius cross energy in $S^3$?

1 vote
1 answer
130 views

What is "Berger's isembolic inequality"?