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Mathematics
Matthias Klupsch's user avatar
Matthias Klupsch's user avatar
Matthias Klupsch's user avatar
Matthias Klupsch
  • Member for 12 years, 9 months
  • Last seen more than a week ago
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I am a mathematician mainly interested in topology, category theory and most of all algebra, especially representation theory.

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Top posts
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52
Are two norms equivalent if they induce the same topology on a vector space?
Feb 15, 2012
answer
16
Group theory: subset of a finite group
Oct 21, 2014
answer
15
$\mathbb{Q}(\sqrt{1-\sqrt{2}})$ is Galois over $\mathbb{Q}$
Nov 28, 2011
answer
12
The set of subsequential limits is closed
Feb 11, 2014
answer
11
Is the unit circle $S^1$ a retract of $\mathbb{R}^2$?
Nov 21, 2011
answer
10
The existence of an eigenvalue of a finite-dim matrix, in a vector space over an arbitrary field.
Aug 2
answer
9
Free module over a ring with identity with a basis of size $m, \ \forall m \ge n$
Dec 17, 2014
answer
9
Basic limit calculation
Nov 27, 2011
answer
9
Inverse limit and group completion are isomorphic
Aug 25, 2021
answer
9
Universal property of the quotient group.
Oct 16, 2015
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34
Returning to academia - continuously rejected
6
Real-valued character in Block with cyclic defect has at most two constituents modulo $p$
6
Dynkin diagram of the centralizer of a semisimple element in a Levi subgroup