High Quality Content by WIKIPEDIA articles! In mathematics, Sylvester's criterion is a necessary and sufficient criterion to determine whether a Hermitian matrix is positive-definite. It is named after James Joseph Sylvester.Sylvester's criterion states that a Hermitian matrix M is positive-definite if and only if all the following matrices have a positive determinant:The proof is only for nonsingular Hermitian matrix with coefficients in Rnxn, therefore only for nonsingular real-symmetric matricesStatement III: If the real-symmetric matrix A is positive definite then A possess factorization of the form A=BTB, where B is nonsingular (Theorem I), the expression A=BTB implies thah A possess factorization of the form A=RTR (Statement II), therefore all the leading principal minors of A are positive (Statement I).

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