[ZT]一道 陶哲轩 的数学题

我说水桶 我拿水桶去做例子
他们硬要以为我是用水桶思考的

团队中
到底是有顶尖高手重要 还是全体水平良好重要
这背后也一定有高深的数学理论支持

而水桶不过是“大白话”说法

道理上和这题我觉得类似

但我没把这题看成下贱的水桶

我就是想说印证 社会科学木桶效应 的 自然科学
和这道题的理论类似

我从来没用木桶效应去印证过这道题

你见过用分析去印证的么

要印证就要拿出公式来

来来，看个漂亮的解法
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10 December, 2008 at 11:13 am

Harald Hanche-Olsen

Imagine you are traveling with your twin brother. At the start of the moving walkway, you step onto the walkway and immediately stop to tie your shoelaces. Your brother stops to tie his before stepping on the walkway. You finish simultaneously and move on. But now you are ahead, and your brother never catches up since you both have the same walking speed.

As for the running part, you run ahead for T seconds until you reach a walkway D meters ahead of your brother, then you revert to your normal walking speed. But you are now on the walkway, so the distance to your brother keeps increasing beyond D. Once he gets on the walkway too, he starts running, but since the distance is greater than D it would now take him longer than T to catch up while you are both still on the walkway.

These arguments should work in special relativity too, I think.
Just before your brother steps onto the moving walkway, he sees the distance to you being bigger than D. That distance, seen as a bit of moving walkway, will suddenly seem even bigger to him once he steps onto the walkway. Again, he can’t catch up.

Anyway, I hope you made it home safely.

这里有更多对的和错的结论和解释，以及作者自己的解答。

http://terrytao.wordpress.com/2008/12/09/an-airport-inspired-puzzle/