b***k
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accumulator (power) 于 (Wed Aug 20 00:26:08 2008) 提到:
有谁能帮忙解答一下这两题?
1. If z is a brownian motion, is z^3 a martingale?
2. A boat is floating in pool and has a small but very heavy rock
in it. If I pick up the rock and throw it in the pool and it sinks to
the bottom, what happens to the level of water in the pool?
谢谢！
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finalguy (答案) 于 (Wed Aug 20 00:35:47 2008) 提到:
是哪里的面试题吗？
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