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seen Apr 2 '13 at 13:07

Dec
3
awarded  Scholar
Dec
3
comment Proving that $\sum_{|j| < n} (n-|j|) \exp(ij\lambda)= \frac{\sin^2(\frac 1 2 n\lambda)}{\sin^2(\frac 1 2 \lambda)}$
Thx Thomas, i did it now your way.
Dec
3
accepted Proving that $\sum_{|j| < n} (n-|j|) \exp(ij\lambda)= \frac{\sin^2(\frac 1 2 n\lambda)}{\sin^2(\frac 1 2 \lambda)}$
Dec
3
revised Proving that $\sum_{|j| < n} (n-|j|) \exp(ij\lambda)= \frac{\sin^2(\frac 1 2 n\lambda)}{\sin^2(\frac 1 2 \lambda)}$
added 155 characters in body
Dec
3
revised Proofing an inequality with a slowly varying function
edited tags
Dec
2
comment Proving that $\sum_{|j| < n} (n-|j|) \exp(ij\lambda)= \frac{\sin^2(\frac 1 2 n\lambda)}{\sin^2(\frac 1 2 \lambda)}$
I edited my originial post where i tried to proof it. Or is there an easier way to prove it than i tried it?
Dec
2
awarded  Supporter
Dec
2
comment Proving that $\sum_{|j| < n} (n-|j|) \exp(ij\lambda)= \frac{\sin^2(\frac 1 2 n\lambda)}{\sin^2(\frac 1 2 \lambda)}$
I tried to proof it your way, but failed again...
Dec
2
revised Proving that $\sum_{|j| < n} (n-|j|) \exp(ij\lambda)= \frac{\sin^2(\frac 1 2 n\lambda)}{\sin^2(\frac 1 2 \lambda)}$
added 1033 characters in body
Nov
30
revised Proving that $\sum_{|j| < n} (n-|j|) \exp(ij\lambda)= \frac{\sin^2(\frac 1 2 n\lambda)}{\sin^2(\frac 1 2 \lambda)}$
added 6 characters in body
Nov
30
revised Proving that $\sum_{|j| < n} (n-|j|) \exp(ij\lambda)= \frac{\sin^2(\frac 1 2 n\lambda)}{\sin^2(\frac 1 2 \lambda)}$
edited tags
Nov
30
asked Proving that $\sum_{|j| < n} (n-|j|) \exp(ij\lambda)= \frac{\sin^2(\frac 1 2 n\lambda)}{\sin^2(\frac 1 2 \lambda)}$
Nov
26
comment Convergence of a quotient of sequences
I am sorry, i forgot an important part of the definition of $p(n)$. I hope it makes now more senses what i did there, because i want to proof it with these conditions.
Nov
26
revised Convergence of a quotient of sequences
I forgot to put the Minimum in front of the set defining p.
Nov
23
comment Convergence of a quotient of sequences
I tried to proof this hypothesis in my edit.
Nov
23
revised Convergence of a quotient of sequences
added 384 characters in body
Nov
23
comment Convergence of a quotient of sequences
Tank you for your answer. So now i have only to proof that $x(t) \le t(a+\log x(t))$ for some constant $a$.
Nov
23
asked Convergence of a quotient of sequences
Oct
9
awarded  Editor
Oct
9
revised Proofing an inequality with a slowly varying function
added 13 characters in body