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6Â¥: Originally posted by jabile at 2014-02-22 09:24:57
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1. A^c \cap \{N=n\}=\{N=n\}\setminus (A\cap \{N=n\})\in \mathcal{F}_n
3.A\cap \{N=n\}=\cup_{k=0}^n A\cap \{M=k\}\cap \{N=n\}\in \mathcal{F}_n...

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feixiaolin

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3Â¥: Originally posted by feixiaolin at 2014-02-21 16:34:30
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