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Fw: [趣事] 小二數學題

[ Math ]0 留言, 推噓總分: 0

作者: hermitdruid - 發表於 2011/11/15 22:06(14年前)

73^F推bemyself:今年弟7 兄1311/14 01:45

Re: [線代] 一個證明

[ Math ]3 留言, 推噓總分: +1

作者: JohnMash - 發表於 2011/08/23 20:42(14年前)

1^F推bemyself:(跪拜) 還有無其它人有想法呢?08/23 21:29

2^F→bemyself:等等, 最後一句要對的前提應是A可逆?不然A若為零矩陣08/23 22:07

3^F→bemyself:怎辦?08/23 22:07

[線代] 一個證明

[ Math ]4 留言, 推噓總分: +1

作者: bemyself - 發表於 2011/08/23 20:08(14年前)

3^F→bemyself:我用樓上的方法證明了Im+B(In-AB)^{-1}A確是Im-BA的08/23 21:45

4^F→bemyself:inverse!!!但是樓上是怎麼得到Im+B(In-AB)^{-1}A的呢08/23 21:46

[線代] 關於linear map的一個證明

[ Math ]12 留言, 推噓總分: +2

作者: bemyself - 發表於 2011/05/31 23:00(14年前)

4^F→bemyself:剛回頭去看了一下,可不可以這樣說:因為empty list()05/31 23:16

5^F→bemyself:被declare成與{0}同義,又因()的length是0,所以{0}的05/31 23:17

6^F→bemyself:長度也是0?05/31 23:18

7^F→bemyself:好像有點說錯......是()的span被定義成與{0}一樣.又05/31 23:21

8^F→bemyself:dimension的定義是linear independent spanning list05/31 23:22

9^F→bemyself:的長度,所以{0}的dimension才會被認做是0...這樣對嗎05/31 23:23

10^F→bemyself:還是說其實這很intuitive而trivial的.未需仔細深究?05/31 23:24

11^F→bemyself:還是大謝上三樓......一語點醒夢中人......05/31 23:53

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