→ ting301 :看到lub就想到曹.... 11/16 14:53
→ cgkm :Hint: (if) By definition, a set contains its max. 11/16 14:55
→ cgkm :(only-if) upper bound contained in S = the max 11/16 14:59
→ sbelon :證 >= 跟 <= ,用定義就證得出來了!! 11/16 15:31
→ x565x :愛用愛普森 11/16 17:28