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106中央資工 線代第18題
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su wilson
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Nov 11, 2018, 1:27:20 AM
11/11/18
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to 黃子嘉 - 線代離散研究室
老師好 想請問一下這題QR分解
老師的解題書上的答案是給abce
但我覺得怪怪的
(a):可不可以QR分解跟有沒有線性獨立的eigenvector 應該是沒有關聯的吧
(e):R 的確會是上三角可逆沒錯但是未必上三角的entry都是正吧 (只有對角項保證是正)
黃老師上課的例題就是一個反例
老師謝謝
林立宇
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Jan 4, 2019, 2:46:04 AM
1/4/19
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to 黃子嘉 - 線代離散研究室
(a) 中央的數學題目常常沒寫清楚, 以歷年題目看來他對於 QR 分解的定義和我們上課定義的版本不太一樣, 他要求一定要行獨立
(e) 你說的沒錯, 寫解答時把題目看錯了, 以為他只考慮對角線項
張巧蓁
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Jan 2, 2020, 1:00:05 AM
1/2/20
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to 黃子嘉 - 線代離散研究室
所以行獨立會有n個獨立的eigenvector 嗎??
蘇家輝
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Jan 2, 2020, 2:59:57 AM
1/2/20
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to 黃子嘉 - 線代離散研究室
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不是喔,上面的矩陣行獨立,可是只有一個eigenvector
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