User Renato G. Bettiol - MathOverflow

Renato G. Bettiol

Member for 12 years, 10 months
Last seen more than a week ago

lehman.edu/faculty/rbettiol
New York, NY, USA

20 Questions

Score Activity Newest Views

40 votes

3 answers

3k views

Height function on 2-torus with only 3 critical points

asked Feb 2, 2016 at 4:38

22 votes

1 answer

937 views

Avoiding integers in the spectrum of the Laplacian of a Riemann surface

asked Oct 31, 2013 at 19:49

18 votes

1 answer

943 views

Possible isometries of a positively curved $S^2\times S^2$

asked Mar 11, 2012 at 21:04

16 votes

2 answers

1k views

Behavior of sectional curvature under metric deformations

asked Jan 14, 2012 at 22:18

15 votes

0 answers

625 views

"Homogeneity" of the Hopf fibration $S^7\to S^{15}\to S^8$ [closed]

asked Nov 28, 2012 at 23:20

15 votes

3 answers

2k views

Characterizing Hessians among symmetric bilinear tensors

asked Mar 5, 2013 at 16:44

13 votes

1 answer

303 views

Were 3-manifolds with $\sec>0$ known to be space forms before Ricci flow?

asked Mar 1, 2017 at 4:44

13 votes

1 answer

2k views

First eigenvalue of the Laplacian on Berger spheres

asked Jun 12, 2011 at 22:57

9 votes

1 answer

1k views

How submanifolds evolve under Ricci flow?

asked Feb 7, 2013 at 21:48

8 votes

1 answer

233 views

Does $S^n\times H^k$ have non-isometric conformal transformations?

asked Jan 5, 2016 at 22:27

7 votes

0 answers

649 views

Least area minimal hypersurface of $\mathbb C P^{n+1}$

asked Jul 13, 2013 at 1:47

7 votes

1 answer

1k views

Multiplicity of eigenvalues of the Laplacian on quaternionic projective space

asked Jul 21, 2011 at 13:17

7 votes

1 answer

388 views

Constant Mean Curvature hypersurfaces "condensing" onto a minimal submanifold

asked Jun 20, 2012 at 4:29

7 votes

1 answer

534 views

Minimal distance spheres in complex projective spaces

asked Aug 23, 2012 at 2:41

7 votes

1 answer

483 views

Open problems about CMC hypersurfaces with symmetries?

asked Oct 2, 2012 at 23:18

6 votes

1 answer

311 views

Hamiltonian polar action with Lagrangian section

asked Dec 13, 2012 at 16:11

5 votes

1 answer

356 views

Symmetries vs. Bound in codimension of Nash isometric embedding

asked Feb 1, 2012 at 4:45

4 votes

0 answers

207 views

Deforming isometric embeddings in low codimension

asked Jun 27, 2012 at 20:19

3 votes

1 answer

1k views

Isometry groups of Riemannian submersions with totally geodesic fibers

asked Oct 26, 2011 at 19:49

2 votes

0 answers

140 views

When are automorphisms of the cohomology ring realized by isometries?

asked Nov 25, 2019 at 23:39