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Ofra
  • Member for 6 years, 9 months
  • Last seen more than 1 year ago
40 votes
7 answers
11k views

Number theory and physics

16 votes
0 answers
540 views

K-theory and homology of groups

12 votes
3 answers
2k views

Undecidable easy arithmetical statement

11 votes
1 answer
508 views

homotopy and (co)filtered limits

11 votes
1 answer
761 views

Dessins d'enfants and absolute Galois group

11 votes
5 answers
3k views

How much do I need to learn algebraic geometry to understand arithmetics over number fields

7 votes
1 answer
818 views

higher algebraic homotopy groups for schemes?

7 votes
1 answer
3k views

Unramified extension of number fields

7 votes
2 answers
1k views

Langlands program vs Shimura-Taniyama-Weil conjecture

6 votes
2 answers
202 views

groupring morphisms and bialgebra

6 votes
2 answers
755 views

Automorphism group of a free product

5 votes
0 answers
188 views

homotopy type of box topology.

4 votes
1 answer
430 views

Bass and Quillen K-theory

4 votes
1 answer
226 views

ring structure on free abelian groups

3 votes
1 answer
360 views

Filtered colim of F-groups

3 votes
1 answer
284 views

Bisimplicial sets and homology

2 votes
1 answer
90 views

Reflexive coequalizer and singular functor.

2 votes
0 answers
189 views

lie algebra associated to a profinite group

2 votes
0 answers
119 views

complex numbers over algebraic numbers, continuous cohomology

2 votes
0 answers
328 views

Automorphism group of $\mathbf{C}$ over $\overline{\mathbf{Q}}$

1 vote
0 answers
665 views

Invertible elements in a group algebra

1 vote
2 answers
1k views

Is the absolute Galois group the same as the automorphism group? [closed]

0 votes
1 answer
125 views

Perfect $Q[G]$-complex

0 votes
0 answers
161 views

short exact sequence of profinite groups

0 votes
1 answer
211 views

Subgroup of free profinite group is free profinite?