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oxeimon
  • Member for 11 years, 11 months
  • Last seen more than a month ago
  • Princeton, NJ, United States
29 votes
4 answers
4k views

Where can I learn about complex differential forms?

17 votes
0 answers
978 views

Algebraically closed fields of characteristic $0$ and $\mathbb{C}$

16 votes
1 answer
3k views

seeing the differential dx/y on an elliptic curve as an element of the sheaf of differentials

12 votes
1 answer
3k views

Must a proper curve minus a point be affine?

9 votes
1 answer
2k views

Does localization commute with taking radicals?

8 votes
1 answer
185 views

Do fiber functors have adjoints?

7 votes
3 answers
612 views

Is a finite group action on a finite set determined by its fixed points?

7 votes
1 answer
515 views

Subgroups of $SL(2,\mathbb{Z})$.

7 votes
1 answer
218 views

Automorphisms of free groups

6 votes
2 answers
759 views

Question about integral closures and localizations

6 votes
1 answer
617 views

open map from a topological space whose connected components aren't open to a connected space

6 votes
1 answer
496 views

Is the sheaf of differentials on an elliptic curve over $R$ with a Weierstrass equation free?

6 votes
1 answer
308 views

Is every unramified extension of DVRs simple?

6 votes
0 answers
176 views

Why must the universal cover of a variety with a rational point also have a rational point?

6 votes
1 answer
204 views

Do any two coprime factors of $x^n-1$ over the $p$-adic integers $\mathbb{Z}_p$ which remain coprime over $\mathbb{F}_p$ generate comaximal ideals?

6 votes
1 answer
310 views

the action of a Lie algebra on itself

5 votes
0 answers
616 views

What is an algebraic scheme?

5 votes
1 answer
2k views

normalization of the nodal cubic

5 votes
1 answer
547 views

What is the intuition behind the unit/counit for the Spec/GlobalSections adjunction?

5 votes
2 answers
245 views

What is the line bundle on $\mathbb{P}^1_\mathbb{C}$ whose transition function is $e^z$

5 votes
2 answers
796 views

If $G$ is a finite group of order $n$, why is it isomorphic to its centralizer in $S_n$?

5 votes
3 answers
806 views

how many empty sets are there?

5 votes
0 answers
167 views

Are noetherian hypotheses necessary for the theory of the etale fundamental group?

5 votes
1 answer
76 views

Will any two elements of orders 4 and 6 generate SL(2,Z)?

5 votes
1 answer
345 views

Is my algebraic space a scheme?

5 votes
1 answer
747 views

Can a conic over $\mathbb{Q}$ with no $\mathbb{Q}$-points have a point of degree 3?

4 votes
1 answer
996 views

fiber products of curves

4 votes
0 answers
58 views

Is any pair of finite 2-generated perfect groups the quotient of a third finite 2-gen perfect group?

4 votes
1 answer
1k views

Are etale morphisms separated?

4 votes
0 answers
117 views

Generating pairs of PSL(2,q)

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