題組內容

Problem 4(12%) 本問題共有(a)、(b)兩個子题,每個子題都只要寫出提問的答案即可(不須寫出答案背後的推導)。

(b) Consider the inner product space V =, where ＜A,B) :=tr(^ATB) for A and B in . Describe Sh as the span of a set of orthonormal vectors in . (7%)