## SQUARE-ROOT MATRICES

Suppose that X and A are matrices and A is positive definite. (A is a positive definite matrix if x’Ax > 0 for every nonzero vector x.) The matrix X is called the square-root of A if X2 = A.Read More

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Suppose that X and A are matrices and A is positive definite. (A is a positive definite matrix if x’Ax > 0 for every nonzero vector x.) The matrix X is called the square-root of A if X2 = A.Read More