作者wawawochi (granada)
看板NCTU-STAT97G
标题[问题] 借我问个线性代数问题
时间Sat Oct 25 00:10:01 2008
亲爱的统研所同学，麻烦你们帮我想一下怎样证明!!感激不尽!!
1. Let A be an m×n matrix. Show that 0 < = rank(A) < = min{m, n}
(小於等於) (小於等於)
2. Show that the rank of a diagonal matrix equals the number of nonzero
diagonal elements it possesses. Is the same true for a triangular matrix?
感谢啦!!!!
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※ 发信站: 批踢踢实业坊(ptt.cc)
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1F：推 hidog88s:1. column rank = row rank 10/25 00:19
2F：推 hidog88s:2.(a) column rank定义 (b) True<应该吧> 10/25 00:26
3F：→ hidog88s:2.(b) 好像false，似乎有明显的反例 10/25 00:44
4F：推 helloboy:楼上我认识你耶!!!!!!!!!!!!!!!!! 10/25 00:46
5F：→ hidog88s:我很无聊= = 都会来偷看你们班板= = 10/25 00:49