作者Nohporelleb ()
看板Math
標題[線代] 兩題矩陣性質的證明題
時間Sun Dec 26 15:15:56 2010
1. Show that all permustation matrices are normal.
2. Show that if A and B are both positive definite, so is A+B.
麻煩了，感謝指導！
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1F：推 smartlwj :2.for all x非0, x^t(A+B)x=x^tAx+x^tBx > 0 12/26 15:40