Date

## 科学的边缘

I can smell wrong papers from a distance
I have no time to read the paper.
The paper is nonsense. The idea is utterly wrong.

Sir, remember, a man like you will never understand the mystery of Nature.
(A frog in the well will never see the whole sky. ---from an old Chinese aphorism)

## 半群的用处

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\Omega-代数第一同构定理

## 郑重推荐WEB数学符号书写解决法

http://www1.chapman.edu/~jipsen/mathml/asciimath.html

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alephoint\varphi\forall\nabla\subseteq E=mc^2e^(ipi)=-1
$AA x in CC (sin^2x+cos^2x=1)$
sum_(i=1)^ni^3=((n(n+1))/2)^2