## Weekly cycle of alivelearn.net traffic

Number of people visiting this blog fluctuates periodically with period 1 week. Basically on weekends few people visit.
Xu Cui
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## Solution of Basel problem by Euler (from wikipedia)

Basel problem: find the exact value of $$1+\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+… = ?$$ Solution: We have by Taylor expansion: $$\sin(x)=x-\frac{x^3}{3!}+\frac{x^5}{5!}-\frac{x^7}{7!}+…$$ Dividing through x we have, $$\frac{\sin(x)}{x}=1-\frac{x^2}{3!}+\frac{x^4}{5!}-\frac{x^6}{7!}+…$$ Note,...
Xu Cui
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## i to i

What is the value of $$i^i$$ $$i$$ being the imagery unit. This beautiful number indeed equals to $$i^i=e^{-\pi/2}=0.2079…$$
Xu Cui
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## Why is temporal lobe called “temporal”

The name of “temporal lobe” follows “temporal bone”. But why “temporal”? The reason is that when people get old, the first region in the...
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## no tissue paper

Original Video– More videos at TinyPic
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## I’m in newspaper :)

Check out http://www.photofunia.com/. It’s fun.
Xu Cui
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