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Ikramov, K.D., Savel’eva, N.V. The inertia of matrices and quadratic forms, conditionally definite matrices, the separation of the roots of algebraic equations, and MAPLE procedures. Program Comput Soft 26, 23–24 (2000). https://doi.org/10.1007/BF02759173
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DOI: https://doi.org/10.1007/BF02759173