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
MathOverflow
Questions
Tags
Users
Badges
Unanswered
Ask Question
Profile
Activity
Dan Petersen
Meta User
Network Profile
Reputation
16,737
16.7k
10.6k
4.4k
2012
2013
2014
2015
Top tag
ag.algebraic-geometry
Next privilege
20,000 Rep.
Access 'trusted user' tools
Badges
2
44
102
Newest
Nice Answer
Next badge
65/100
Sportsmanship
Impact
~
255k
people reached
27 posts edited
88 helpful flags
4,355 votes cast
summary
answers
questions
tags
badges
favorites
bounties
reputation
all actions
212
Answers
newest
activity
votes
62
Examples where it's useful to know that a mathematical object belongs to some family of objects
Sep 1 '11 at 6:18
60
Can the fundamental group of any manifold be realized as the fund grp of a finite space?
Nov 10 '10 at 13:01
48
Structures that turn out to exhibit a symmetry even though their definition doesn't
Dec 14 '13 at 20:52
31
Most memorable titles
Oct 31 '10 at 16:38
30
Can we have A={A} ?
Jul 25 '10 at 15:20
29
What does the term “yoga” mean in mathematics?
May 6 '11 at 2:28
28
Is the moduli space of curves defined over the field with one element?
Jan 3 '12 at 3:57
26
Ring-theoretic characterization of open affines?
Apr 8 '10 at 21:49
24
Automorphism group of a scheme
Feb 10 '11 at 16:21
23
Is there a higher Grothendieck ring?
Aug 21 '14 at 7:37
23
how does one understand GRR? (Grothendieck Riemann Roch)
Apr 27 '11 at 10:18
23
Pseudonyms of famous mathematicians
Nov 7 '10 at 21:56
21
Applications of Grothendieck-Riemann-Roch?
Oct 27 '10 at 7:45
20
Parodies of abstruse mathematical writing
Mar 14 at 6:12
20
Number of curves over a finite field
Dec 9 '13 at 20:27
20
Example of an unnatural isomorphism
Aug 14 '13 at 9:03
19
How should one understand orbifold fundamental groups?
Aug 30 '12 at 8:30
18
Certain signed sum over $S_n$
Jan 25 at 21:29
17
Ring with three binary operations
Feb 5 '13 at 16:45
17
“Surprising” categorical equivalences
Mar 6 '11 at 12:23
16
Is it true that if $M$ is injective then $S^{-1}M$ is also injective
Sep 8 '13 at 13:44
16
Teichmuller modular forms and number theory
Dec 12 '10 at 11:43
15
Cohomology of configuration space as a representation of the symmetric group
Sep 15 at 7:38
15
What is the intuition inertia orbifold (or stack)?
Feb 21 '13 at 15:30
14
Singularities of moduli spaces of curves
Jan 7 '14 at 8:46
14
Count of full, binary trees with fixed number of leaves
Feb 25 '10 at 15:33
13
Are all parametrizations via polynomials algebraic varieties?
Aug 31 '10 at 9:04
13
Is the Euler characteristic a birational invariant
May 25 '10 at 21:25
12
Framed version of braided monoidal category
Nov 12 '14 at 19:56
12
Is it written anywhere that open subvarieties of affine spaces have “completely impure” cohomology?
May 28 '12 at 22:02
MathOverflow works best with JavaScript enabled