Robin Chapman

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13,228 reputation

22147

bio	website	empslocal.ex.ac.uk/people/…
	location	Exeter, United Kingdom
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visits	member for	1 year, 9 months
	seen	Jan 10 '11 at 11:54
stats	profile views	2,841

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195 Answers

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35	Does there exist a bijective $f:\mathbb{N} \to \mathbb{N}$ such that $\sum f(n)/n^2$ converges?
29	Does $R[x] \cong S[x]$ imply $R \cong S$?
29	If a \| m and (a + 1) \| m, prove a(a + 1) \| m
25	Why is $e^{\pi \sqrt{163}}$ almost an integer?
24	mystery regarding power series of $\frac{1}{\sqrt{1+x^{x}}}$

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13,228 Reputation

+10	How to show that all even perfect numbers are obtained via Mersenne primes?
+10	Rigorous synthetic geometry without Hilbert axiomatics
+10	If $R$ is a commutative ring with identity, and $a, b$ are its elements that are divisible by each other, is it true that they must be associates?
+10	pigeon-hole and parity

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108 Tags

266 number-theory × 33	72 commutative-algebra × 9
164 abstract-algebra × 25	67 complex-analysis × 7
142 analysis × 13	66 combinatorics × 16
118 calculus × 20	66 group-theory × 15
90 real-analysis × 10	61 trigonometry × 8

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2 Accounts

$Mathematics$	Mathematics	13,228 rep	22147
	Area 51	151 rep	1

70 Badges

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calculus	abstract-algebra
Nice Answer × 35	Yearling
Populist	Generalist
Good Answer × 4	Quorum
Enlightened × 13	Pundit

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241 Votes Cast

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211	up		57	question
30	down		184	answer

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