CPSC 491
CPSC 491. Xin Liu November 22, 2010. A change of Bases. A mxn =UΣV T , U mxm , V nxn are unitary matrixes Σ mxn is a diagonal matrix Columns of a unitary matrix form a basis Any b in R m can be expanded in {u 1 , u 2 , …, u m } b = Ub ’ <==> b ’= U T b
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