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algori's user avatar
algori
  • Member for 14 years, 4 months
  • Last seen more than a week ago
1 vote
Accepted

Second cohomology group with finite coefficients of the product of two varieties

5 votes
Accepted

Elastostatics and homotopy type

1 vote

Simple system of ODEs with periodic coefficients

4 votes
Accepted

Holomorphic map from a neighborhood in $\mathbb C$ to S^3

4 votes
Accepted

Invariant Metrics on the Sphere

2 votes

Examples of Lie group actions on manifolds with singular quotients

2 votes

Oriented vs. unoriented knot polynomials

5 votes

intersections of real algebraic sets (a bezout-type question)

2 votes

homeomorphism of topological group

3 votes
Accepted

de Rham cohomology class of diagonal

3 votes
Accepted

Minimal models with local coefficients

13 votes
Accepted

Is every closed embedded codimension-n submanifold cut out by a section of a rank-n vector bundle?

1 vote

Group cohomology of an abelian group with nontrivial action

5 votes

How do I get the correct long exact sequence for relative group cohomology in terms of derived functors?

3 votes
Accepted

Classical invariant theory: absolute rational invariants and $GL(2)$-orbits

11 votes

Stiefel-Whitney Classes over Integers?

4 votes

Sheaves with isomorphic cohomology, but not quasi-isomorphic

4 votes

The half-life of a theorem, or Arnold's principle at work

50 votes

Can non-homeomorphic spaces have homeomorphic squares?

3 votes
Accepted

Euler characteristics and characteristic classes for real manifolds?

2 votes

Complex analytic space with no (positive dim.) subscheme ?

4 votes

Constructions unique up to non-unique isomorphism

19 votes
Accepted

If the total Chern class of a vector bundle factors, does it have a sub-bundle?

4 votes

Lefschetz hyper-plane theorem for singular projective varieties?

15 votes

How should one think about pushforward in cohomology?

12 votes

Ideas on how to prevent a department from being shut down.

49 votes

What universities have laid off tenured math faculty for financial reasons?

56 votes

Mathematical "urban legends"

7 votes

Is the weight filtration a topological invariant?

19 votes
Accepted

Can a Lie group as an abstract group be given more than one topology making it a Lie group?