Christian Blatter

ETH Zurich (Switzerland)

math.ethz.ch/~blatter

Age: 80

13h
answered Why is this a useful way to prove the characterisation of bases?
1d
revised Farthest point on parallelogram lattice
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1d
revised Farthest point on parallelogram lattice
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1d
answered Farthest point on parallelogram lattice
1d
awarded Yearling
1d
answered Derivation of the equation for the envelope
1d
revised Derivation of the equation for the envelope
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2d
answered Asymptotic Estimates for a Strange Sequence
2d
comment Asymptotic Estimates for a Strange Sequence
Plotting the $a_k$ for $k\leq2000$ shows that $a_k\doteq 0.511\>k^2$ with good accuracy.
Jul
29
awarded Nice Answer
Jul
28
answered New Idea to prove $1+2x+3x^2+\cdots=(1-x)^{-2}$
Jul
28
revised Values of the sums $\sum\limits_{k=1}^{n}\cos^4(πk/(2n+1))$
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Jul
28
answered Values of the sums $\sum\limits_{k=1}^{n}\cos^4(πk/(2n+1))$
Jul
28
answered What is meaning of this question and how to solve it?
Jul
25
answered Can you tell me if this is a calculus problem?
Jul
25
answered Prove that $\alpha + \beta=\frac {\pi}{2}$
Jul
25
answered How to prove the existence of vectors?
Jul
25
comment Prove that the equation $x^{10000} + x^{100} - 1 = 0$ has a solution with $0 < x < 1$
@User: It is not easy to compute things like $0.999661^{10\,000}$ with high accuracy. Another point: The aim was to obtain a usable estimate for $\xi$ using solely calculus methods.
Jul
25
revised How many ways to arrange the seating?
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Jul
24
revised How many ways to arrange the seating?
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