Stefan Walter

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1,796 reputation

423

bio	website
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	age	25
visits	member for	2 years, 8 months
	seen	2 days ago
stats	profile views	279

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46 Questions

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22	Elementary proof of $m^n\neq n^m$ for almost all natural numbers $m\neq n$
14	Why does $K \leadsto K(X)$ preserve the degree of field extensions?
14	Intuition behind Conditional Expectation
12	If $C$ is a component of $Y$ and a component of $Z$, is it a component of $Y\cup Z$?
11	Why does a convex set have the same interior points as its closure?

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1,796 Reputation

+5	Why do elements of coprime orders commute in nilpotent groups?
+10	Intuition behind Conditional Expectation
+10	Alternative proof about the order of the alternating group?
+10	Making some standard theoretical physics argument rigorous

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15 Answers

votes activity newest

10	A mapping of an infinite set into itself has an invariant subset
7	How much rigour in proofs?
6	Strategies for Effective Self-Study
5	What's bad about calling $i$ “the square root of -1”?
5	difference between maximal element and greatest element

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47 Tags

15 elementary-set-theory × 5	5 complex-numbers × 2
7 abstract-algebra × 18	5 reference-request × 2
7 group-theory × 15	4 modules × 5
7 self-learning × 2	3 finite-groups × 4
5 order-theory × 3	3 soft-question × 2

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4 Accounts

$Mathematics Stack Exchange$	Mathematics	1,796 rep	423
	German Language & Usage	1,233 rep	410
	Super User	133 rep	3
	Chess	101 rep	1

18 Badges

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Caucus × 3	Yearling × 2
Tumbleweed	Nice Answer
Popular Question × 2	Constituent
Nice Question × 6	Self-Learner
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117 Votes Cast

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