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Brief Communications

On the Deficiency Indices of Block Jacobi Matrices Related to Dirac Operators with Point Interactions

V. S. Budyka^a, M. M. Malamud<sup>b

a</sup> Donetsk State Academy of Management
^b Peoples' Friendship University of Russia, Moscow

Keywords: Jacobi matrix, deficiency indices, Dirac operator, discrete spectrum, point interactions.

Received: 02.06.2019

DOI: 10.4213/mzm12465

 English version: Mathematical Notes, 2019, 106:6, 1009–1014

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