問題詳情
【題組】
(ii) (10 %) Suppose that A,
and Tr
(A) denotes the trace of A (i.e.,the sum of all the diagonal elements of A).
(1)Is Tr(AX)≥0 true?
(2)Is it true that if Tr(AX) = 0, then
(zero matrix)?
Prove or disprove your answer.
參考答案
答案：C
難度：適中0.5
統計：A(1),B(0),C(1),D(0),E(0)