current community
chat
MathOverflow
MathOverflow Meta
your communities
Sign up
or
log in
to customize your list.
more stack exchange communities
company blog
Stack Exchange
Inbox
Reputation and Badges
sign up
log in
tour
help
Tour
Start here for a quick overview of the site
Help Center
Detailed answers to any questions you might have
Meta
Discuss the workings and policies of this site
About Us
Learn more about Stack Overflow the company
Business
Learn more about hiring developers or posting ads with us
MathOverflow
Questions
Tags
Users
Badges
Unanswered
Ask Question
Profile
Activity
Anton Petrunin
Meta User
Network Profile
Reputation
20,688
20.7k
14.8k
8.9k
2013
2014
2015
2016
Top tag
mg.metric-geometry
Next privilege
25,000 Rep.
Access to site analytics
Badges
5
63
159
Newest
alexandrov-geometry
Next badge
58/100
Socratic
Impact
~
629k
people reached
22 posts edited
9 helpful flags
3,065 votes cast
summary
answers
questions
tags
badges
favorites
bounties
reputation
all actions
331
Answers
newest
activity
votes
82
Which mathematicians have influenced you the most?
Nov 14 '09 at 15:44
75
Elementary+Short+Useful
Apr 3 '11 at 21:05
66
Famous mathematical quotes
Nov 29 '09 at 22:45
43
Elementary+Short+Useful
Apr 3 '11 at 20:57
34
Your favorite surprising connections in Mathematics
Feb 8 '10 at 0:59
32
An inequality for cosine of n
Feb 16 '11 at 16:44
24
Light rays bouncing in twisted tubes
Jul 15 '11 at 12:13
22
Is a function with nowhere vanishing derivatives analytic?
Dec 26 '13 at 2:52
20
Is Euclid dead?
Dec 19 '13 at 22:16
20
Mathematical “urban legends”
Feb 8 '11 at 21:27
20
Can a connected planar compactum minus a point be totally disconnected?
Feb 27 '10 at 19:42
19
Are there smooth bodies of constant width?
Feb 3 '11 at 23:20
17
Is the “Napkin conjecture” open? (origami)
Apr 8 '11 at 23:10
17
Does a Riemannian manifold with bounded geometry admit an isometric proper embedding into Euclidean space with uniformly thick tubular neighborhood
Mar 18 '13 at 17:07
17
Down-To-Earth Uses of de Rham Cohomology to Convince a Wide Audience of its Usefulness
Mar 1 '11 at 19:55
16
Why are isometries of Minkowski space necessarily linear?
Dec 30 '11 at 5:59
16
Space of metrics with positive sectional curvature
Sep 29 '11 at 1:23
15
Tetrahedron splitting/subdivision
Jun 18 '10 at 11:46
15
Is every smooth function Lebesgue-Lebesgue measurable?
Mar 26 '10 at 22:12
15
Are there any books that take a 'theorems as problems' approach?
Jan 23 '10 at 2:08
14
Are the higher homotopy groups of the Hawaiian earring trivial?
Apr 20 '14 at 1:44
14
Converse to Milnor's theorem on manifolds with nonnegative Ricci curvature.
May 8 '13 at 15:54
14
Does a connected manifold with vanishing Euler characteristic admit a nowhere-vanishing vector field?
May 5 '13 at 18:53
14
How many times line segments can intersect a Jordan curve?
Jun 19 '12 at 19:06
14
Feasibility of a list of prescribed distances in R^3
Dec 4 '09 at 19:04
14
When does the set of isometries form a group?
Sep 17 '11 at 22:21
14
What is the defining formula for Sectional Curvature
Apr 18 '11 at 1:27
14
What should be taught in a 1st course on smooth manifolds?
Mar 19 '11 at 2:38
13
Advanced Differential Geometry Textbook
Aug 29 '15 at 23:06
13
Geodesics in $\mathbb{R^2} \times \mathbb{S^1}$ under “segment” metric
Sep 23 '11 at 0:51
MathOverflow works best with JavaScript enabled