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tj_
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26 votes
3 answers
5k views

Why is BG infinite dimensional for G finite ?

11 votes
4 answers
2k views

Examples of Tate cohomology rings

9 votes
0 answers
673 views

Can the Bockstein spectral sequence be used to compute cohomology rings ?

8 votes
1 answer
886 views

Which information can be obtained from Poincaré series ?

7 votes
1 answer
502 views

Asymptotics for the coefficients of a rational function

7 votes
0 answers
344 views

Riemann hypothesis and additive structure of the integers

6 votes
2 answers
537 views

Properties of ring epimorphisms that are true only over commutative rings

6 votes
3 answers
1k views

Are epimorphisms from a division ring isomorphisms ?

5 votes
2 answers
833 views

Epimorphisms and free submodules

5 votes
0 answers
67 views

Minimal growth condition for a rearrangement

4 votes
2 answers
415 views

Are homogeneous components of f.g graded modules f.g ?

3 votes
2 answers
396 views

Sign in the product of the LHS spectral sequence

3 votes
1 answer
746 views

Function whose sets of discontinuities and zeros are the rationals

2 votes
2 answers
400 views

Coefficients of entire functions with specified zero set

2 votes
0 answers
102 views

Lattices with trivial coinvariants for finite groups

2 votes
1 answer
916 views

Why do we use the diagonal for diagonal approximations ?

1 vote
0 answers
127 views

Integrability conditions imply existence of potential