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Matthias Klupsch

I am a postdoc at RWTH Aachen University. I am mainly interested in topology, category theory and most of all algebra, especially representation theory.

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Top posts (202) All Questions Answers | Votes Newest

19 Are two norms equivalent if they induce the same topology on a vector space? Feb 15 '12
16 Group theory: subset of a finite group Oct 21 '14
13 $\mathbb{Q}(\sqrt{1-\sqrt{2}})$ is Galois over $\mathbb{Q}$ Nov 28 '11
10 Basic limit calculation Nov 27 '11
9 Is the unit circle $S^1$ a retract of $\mathbb{R}^2$? Nov 21 '11
8 Free module over a ring with identity with a basis of size $m, \ \forall m \ge n$ Dec 17 '14
7 Universal property of the quotient group. Oct 16 '15
7 Does the sum of digits of prime number written in base7 never divide by 3? Nov 4 '15
6 A proper subfield of $\mathbb{R}$ must not be connected? Nov 11 '15
6 I must be misunderstanding bijection on uncountable sets. (As it relates to stereographic projection) Oct 31 '14
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