[分析] 空集合的交集是宇集合?
拓樸學第一堂課教到這個觀念
證明沒問題(是用反證法證)
但是直觀好難想像
有人對這結果有直觀的想法嗎?
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◆ From: 140.136.208.186
※ 編輯: henry781114 來自: 140.136.208.186 (09/27 12:52)
推
09/27 13:17, , 1F
09/27 13:17, 1F
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09/27 17:05, , 2F
09/27 17:05, 2F
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09/27 17:23, , 3F
09/27 17:23, 3F
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09/27 18:02, , 4F
09/27 18:02, 4F
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09/27 18:02, , 5F
09/27 18:02, 5F
推
09/27 22:55, , 6F
09/27 22:55, 6F
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09/27 22:57, , 7F
09/27 22:57, 7F
推
09/28 06:34, , 8F
09/28 06:34, 8F
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09/28 06:36, , 9F
09/28 06:36, 9F
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09/28 10:18, , 10F
09/28 10:18, 10F
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09/28 10:19, , 11F
09/28 10:19, 11F
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09/28 10:19, , 12F
09/28 10:19, 12F
推
09/28 12:07, , 13F
09/28 12:07, 13F
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09/28 13:37, , 14F
09/28 13:37, 14F
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09/28 13:43, , 15F
09/28 13:43, 15F
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09/28 17:52, , 16F
09/28 17:52, 16F
推
09/28 20:44, , 17F
09/28 20:44, 17F
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09/29 00:46, , 18F
09/29 00:46, 18F
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09/29 00:48, , 19F
09/29 00:48, 19F
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09/29 00:49, , 20F
09/29 00:49, 20F
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09/29 02:19, , 21F
09/29 02:19, 21F
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09/29 02:20, , 22F
09/29 02:20, 22F
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09/29 02:20, , 23F
09/29 02:20, 23F
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09/29 02:21, , 24F
09/29 02:21, 24F
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09/29 02:21, , 25F
09/29 02:21, 25F
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09/29 02:22, , 26F
09/29 02:22, 26F
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09/29 02:23, , 27F
09/29 02:23, 27F
推
09/29 12:53, , 28F
09/29 12:53, 28F
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09/30 00:07, , 29F
09/30 00:07, 29F
→
01/02 15:32,
5年前
, 30F
01/02 15:32, 30F
→
07/07 11:28,
4年前
, 31F
07/07 11:28, 31F