作者wawawochi (granada)
看板NCTU-STAT97G
標題[問題] 借我問個線性代數問題
時間Sat Oct 25 00:10:01 2008
親愛的統研所同學，麻煩你們幫我想一下怎樣證明!!感激不盡!!
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?
感謝啦!!!!
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1F：推 hidog88s:1. column rank = row rank 10/25 00:19
2F：推 hidog88s:2.(a) column rank定義 (b) True<應該吧> 10/25 00:26
3F：→ hidog88s:2.(b) 好像false，似乎有明顯的反例 10/25 00:44
4F：推 helloboy:樓上我認識你耶!!!!!!!!!!!!!!!!! 10/25 00:46
5F：→ hidog88s:我很無聊= = 都會來偷看你們班板= = 10/25 00:49