Mathematics
user avatar
user avatar
user avatar
Robin Chapman
  • Member for 11 years, 10 months
  • Last seen more than 11 years ago
Profile Activity
Stats
21,492
reputation
1.1m
reached
195
answers
0
questions
Communities
Badges
View all badges
2
gold badges
59
silver badges
78
bronze badges
Top tags
View all tags
459
Score
32
Posts
16
Posts %
313
Score
25
Posts
13
Posts %
266
Score
12
Posts
6
Posts %
239
Score
20
Posts
10
Posts %
181
Score
11
Posts
6
Posts %
110
Score
15
Posts
8
Posts %
Top posts
View all questions and answers
All Questions Answers
Score Newest
answer
87
Evaluating the integral $\int_0^\infty \frac{\sin x} x \,\mathrm dx = \frac \pi 2$?
Sep 23, 2010
answer
78
Why is $e^{\pi \sqrt{163}}$ almost an integer?
Sep 13, 2010
answer
67
If $a \mid m$ and $(a + 1) \mid m$, prove $a(a + 1) | m$.
Aug 23, 2010
answer
56
Inverse of an invertible triangular matrix (either upper or lower) is triangular of the same kind
Sep 17, 2010
answer
53
Are all algebraic integers with absolute value 1 roots of unity?
Sep 9, 2010
answer
51
Comparing $\pi^e$ and $e^\pi$ without calculating them
Oct 26, 2010
answer
46
Does $R[x] \cong S[x]$ imply $R \cong S$?
Dec 8, 2010
answer
44
Does there exist a bijective $f:\mathbb{N} \to \mathbb{N}$ such that $\sum f(n)/n^2$ converges?
Aug 11, 2010
answer
34
Efficiently finding two squares which sum to a prime
Oct 2, 2010
answer
32
Why is it harder to prove which integers are sums of three squares rather than sums of two squares or four squares?
Dec 9, 2010
Top Meta posts
2
2
33
The return key in comments
25
Threatening emails from Jeff Atwood
4
Visual noise on the main page
3
To what extent should copyrighted material be made available on math.se?
Top network posts
View all network posts
86
Are the rationals homeomorphic to any power of the rationals?
80
Is there a dense subset of the real plane with all pairwise distances rational?
42
Function with range equal to whole reals on every open set
38
Largest number of vectors with pairwise negative dot product
34
Shortest/Most elegant proof for $L(1,\chi)\neq 0$

Your privacy

By clicking “Accept all cookies”, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy.