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Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 41, No. 11, pp. 1563–1566, November, 1989.
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Ivanov, A.S. Smooth diagonalization of Hermitian matrix-functions. Ukr Math J 41, 1349–1351 (1989). https://doi.org/10.1007/BF01056508
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DOI: https://doi.org/10.1007/BF01056508