Andreas Thom

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Name Andreas Thom
Member for 2 years
Seen 6 hours ago
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Location Dresden, Germany
Age 35
I am a mathematician working at the University of Leipzig.
48

Questions
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Adjacency matrices of graphs

jan 19 11 at 5:40 Tracy Hall 1,679●4●12

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Ring of closed manifolds modulo fiber bundles

aug 26 10 at 12:13 Igor Belegradek 9,871●1●13●42

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Finite subgroups of unitary groups

apr 23 11 at 10:14 Geoff Robinson 9,856●1●21●27

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Subalgebras of von Neumann algebras

aug 9 10 at 5:04 Andreas Thom 13.1k●1●23●64

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126

Answers
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36
morphism from a compact group to Z ?
30
Proofs that require fundamentally new ways of thinking (2)
25
On the size of balls in Cayley graphs
23
Example for column rank $\neq$ row rank
16
Is a map a homotopy equivalence if its suspension is so?
15
Discrete-compact duality for nonabelian groups (2)
15
Which finite groups have faithful complex irreducible representations?
15
contractible manifolds
13
A non-trivial property of all groups
12
Is every finitely generated group colimit of residually finite groups
12
Properties of a non-sofic group
12
Is $SU(\infty)$ amenable?
11
residually finite-by-$\mathbb{Z}$ groups are residually finite (2)
11
Is the Euler characteristic of aspherical connected 2-complexes at most 1? (No!) What can be said about subcomplexes of 2-complexes deformation retractible onto graphs.
11
Is “subamenable” the same as amenable? (2)
11
What is the commutative analogue of a C*-subalgebra?
10
Why does the Grothendieck group $K_0(R)$ of a ring not depend on our choice of using left modules instead of right modules?
10
Groups with large negative deficiency
10
No injective groups with more than one element?
10
Haar measure of a subgroup
9
Centraliser of the complex conjugation in the absolute Galois group
9
`Naturally occuring' $K(\pi, n)$ spaces, for $n \geq 2$.
9
Is the group von Neumann algebra construction functorial?
9
Relative Bicommutant
8
non-Identity operator on a separable Hilbert space
8
Are semi-direct products categorical limits?
8
Dehn’s solution to Hilbert’s 3rd: 1901 or 1902?
8
On closed totally disconnected subgroups of connected real Lie groups
8
Uncertainty principle for non-commutative groups
7
(Non)free differential calculus
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