[其他] 拓樸學證明

看板Math作者NTUEEboy ( ＮＴＵＥＥ)時間12年前 (2012/03/10 19:00)推噓2(2推 0噓 2→)

留言4則, 4人參與討論串3/3 (看更多)

Let S be an arbitary set. prove (a) δS is closed (b) S^0 is open (c) The exterior of S is open (d) The limit points of S form a closed set (e) ═ ─ S = S 以上幾題希望有大大可以幫我解答一下拜託謝謝喔 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 61.224.42.173

推

jacky7987

03/10 22:23, , 1^F

03/10 22:23, 1^F

→

NTUEEboy

03/10 23:31, , 2^F

03/10 23:31, 2^F

推

czk0622

03/12 16:11, , 3^F

03/12 16:11, 3^F