Talk:Combinatorics (Fall 2010)/Extremal set theory II

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Revision as of 14:05, 15 November 2010 by 210.28.131.82 (talk)
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Heredity应该在down-shift前面提一下

down-shift之前因该讲Heredity啊!要不然down-shift太突兀了 by 詹宇森