References
N. V. Ilyushechkin, “The discriminant of the characteristic polynomial of a normal matrix.” Mat. Zametki.51, No. 3, 16–23 (1992).
F. R. Gantmakher, Matrix Theory [in Russian], Nauka, Moscow (1988).
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Translated from Matematicheskie Zametki, Vol. 56, No. 1, pp. 26–31, July, 1994.
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Ilyushechkin, N.V. Orthogonal invariants of skew-symmetric matrices. Math Notes 56, 669–672 (1994). https://doi.org/10.1007/BF02110554
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DOI: https://doi.org/10.1007/BF02110554