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作者 alternate 在 PTT [ Math ] 看板的留言(推文), 共9則
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[分析] (0,+inf)是開集？
[ Math ]34 留言, 推噓總分: +9
作者: alternate - 發表於 2017/09/01 10:20(8年前)
12F→alternate: 所以是任意一個點就好嗎09/01 15:09
13F→alternate: 我現在的書上寫every point x belongs to A is infe09/01 15:10
14F→alternate: rior to A09/01 15:10
18F→alternate: 那如果我在無窮大的那個數字上取點 他不就是bounda09/01 15:32
19F→alternate: ry而不是interior了09/01 15:32
20F→alternate: 抱歉我初學 觀念有點差09/01 15:32
27F→alternate: 了解 我大概知道了 謝謝大家幫忙！09/01 15:48
33F→alternate: 欸對欸，我被蒙蔽了雙眼哈哈哈09/02 10:33
34F→alternate: 再謝謝各位大大的指教09/02 10:33
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