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hubeizk

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1.Èç¹ûNÊÇÒ»¸östopping time£¬ÄÇôÊÇÒ»¸öÓò£¬ÆäÖÐ is the collection of sets A that have A {N = n} for all n < ¡Þ. ΪʲôÊÇÒ»¸öÓò£¿Ö÷ÒªÏëÎÊÈçºÎ´ÓA ÍÆ AµÄ²¹¼¯Ò²ÔÚ ÀïÃæ£»
2.Èç¹û £¬²¢ÇÒNÊÇÒ»Stopping Time, ÄÇ ´ú±íʲôÒâ˼£¿
3. Èç¹ûMºÍN¶¼ÊÇstopping time£¬ÇÒM<=N£¬ÈçºÎÍÆµ¼£¿
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[ Last edited by feixiaolin on 2014-2-21 at 16:33 ]
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jabile

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8Â¥: Originally posted by hubeizk at 2014-02-24 15:58:56
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Show that if  Y_n \in \mathcal{F}_n£¬and N is a stopping time, Y_N \in \mathcal{F}_N .

\{Y_N\in A\}\cap \{N=n\}= \{N=n\}\cap \{Y_n\in A\}
9Â¥2014-02-24 16:02:51
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hubeizk

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2Â¥2014-02-21 16:23:50
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feixiaolin

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2Â¥: Originally posted by hubeizk at 2014-02-21 16:23:50
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hubeizk

Òø³æ (СÓÐÃûÆø)

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