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Sam Hughes's user avatar
Sam Hughes's user avatar
Sam Hughes
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10 Questions

Score Activity Newest Views
4 votes
1 answer
110 views

$\mathbb{Z}$-forms of rational representation of finite group

3 votes
1 answer
428 views

Künneth spectral sequence for cohomology of chain complexes of $R$-modules

5 votes
1 answer
236 views

Quasi-isometric rigidity of surface groups and commensurability

2 votes
0 answers
153 views

$k$-invariants of $KO$ and $ko$ and differentials in the AHSS spectral sequence

7 votes
1 answer
248 views

Is the commensurator of a tree lattice a simple group?

12 votes
2 answers
644 views

$d^3$ in the Atiyah-Hirzebruch spectral sequence for (twisted) $KO$

5 votes
0 answers
181 views

Examples of non-uniform lattices in products of trees

1 vote
1 answer
167 views

Reference request: The commensurator of an arithmetic lattice is a simple group

4 votes
0 answers
82 views

Branched 2-fold covering over edge of a 3-orbifold

15 votes
2 answers
966 views

Is an HNN extension of a virtually torsion-free group virtually torsion-free?