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Completeness of Sina December 9, 2007

Posted by Sina in : Main , trackback

Let ? be the set of all persons, and let X,Y??, X?Y. The following statements are equivalent:

(1) X is the best.

(2) For any worth assignment v : ? ? ? ,

v(X) > v(Z) for any Z??, Z?X.

(3) X?Y is the best, and Y is not the best.

(4) X is Sina.

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