Geodesic
An Analog of Orlov's Theorem on the Deficiency Index of Second-Order Differential Operators
Matematičeskie zametki, Tome 97 (2015) no. 2, pp. 314-317 Cet article a éte moissonné depuis la source Math-Net.Ru

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Keywords: quasi-derivative, quasi-differential expression with matrix-valued coefficients, minimal and maximal operators, deficiency number, deficiency index. 
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I. N. Braeutigam; K. A. Mirzoev; T. A. Safonova. An Analog of Orlov's Theorem on the Deficiency Index of Second-Order Differential Operators. Matematičeskie zametki, Tome 97 (2015) no. 2, pp. 314-317. http://geodesic.mathdoc.fr/item/MZM_2015_97_2_a14/

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