Mathematics
J.R.'s user avatar
J.R.'s user avatar
J.R.'s user avatar
J.R.
  • Member for 11 years, 1 month
  • Last seen more than 1 year ago
  • Bonn, Germany
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All Questions Answers
Score Newest
answer
51
Is every composite number the average of two primes?
Mar 10, 2015
answer
49
"Simple" beautiful math proof
Mar 26, 2014
answer
30
A natural proof of the Cauchy-Schwarz inequality
Jul 5, 2013
answer
24
Evaluate $\sum^\infty_{n=1} \frac{1}{n^4} $using Parseval's theorem (Fourier series)
Jan 25, 2014
answer
21
Sum of four squares not a prime
Feb 18, 2014
answer
20
Convergence of the sequence $\frac{1}{n\sin(n)}$
Feb 6, 2014
answer
20
What is the difference between totally bounded and uniformly bounded?
Oct 16, 2012
answer
19
Proof of an equality involving cosine $\sqrt{2 + \sqrt{2 + \cdots + \sqrt{2 + \sqrt{2}}}}\ =\ 2\cos (\pi/2^{n+1})$
Jan 24, 2014
answer
19
Hatcher Problem 2.2.36
Feb 9, 2014
answer
17
convexity of inverse function
Feb 26, 2014

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