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ÒѾ֪µÀFenchel dualityÓÐÈçÏÂÐÔÖÊ,Èç¹ûf(x)͹,Ôò£º min_x f(x) = max_u f*(u), ÆäÖÐf*ÊÇfµÄ¹²éÊý. Èç¹ûfÊǶàÔªº¯Êý,±ÈÈç¶þÔªº¯Êýf(x,y), Æä¶ÔxºÍy·Ö±ð͹£¨½«ÁíÍâÒ»¸öÔªÊÓΪ²ÎÊý),µ«¶ÔxºÍy·ÇÁªºÏ͹.ÄÇôÏÂÃæµÄµÈʽÊÇ·ñ³ÉÁ¢? min_{x,y} f(x,y) = max_{u,v} f*(u,v) |
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