[線代] 對稱正定矩陣的奇異值比較
Let A, B be two symmetric positive definite matrices with eigenvalues >= 1.
Prove that the k-th singular value of BA is greater than or equal to
the k-th singular value of A.
用計算機很容易就驗證出來了, 但不知道怎樣下手去證.
故向各位版友請益.
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