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Fred Rohrer

Apparently, this user prefers to keep an air of mystery about them.

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Top posts (124) All Questions Answers | Votes Newest

25 What is the dimension of the product ring $\prod \mathbb Z/2^n\mathbb Z$ ? Mar 12 '12
23 Blackbox Theorems Jun 14 '12
15 injectivity of torsion submodules of injectives Nov 23 '10
14 Most intriguing mathematical epigraphs Sep 29 '15
13 Pages from a known textbook on Euclidean geometry? Oct 17 '18
13 What's the notation for a function restricted to a subset of the codomain? May 24 '11
12 Why did Bourbaki ignore the theory of categories? May 24 '13
11 How do we formally construct the successor universe $\mathscr{U}^+$ of a universe $\mathscr{U}$ in $\mathsf{ZFC}$? Nov 18 '18
10 Is the empty graph a tree? Feb 1 '13
9 Properties of rings that have an elegant description in terms of the associated category of modules Mar 25 '14
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