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The problem of completeness of a system of exponential functions. (English. Russian original) Zbl 0167.35602

Sib. Math. J. 8(1967), 1-6 (1968); translation from Sib. Mat. Zh. 8, 3-10 (1967).

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[1] A. F. Leont’ev, Difference-differential equations with linear coefficients [in Russian], Trudy Gorikovsk. Gos. Ped. Inst. A. M. Gorkii (Fiz.-Matem. Fak.), No. 14, 3-30 (1951).
[2] A. F. Leont’ev, Difference-Differeunial Equations [in Russian], Candidate’s dissertation, Gorikovskii Univ. (1942).
[3] A. A. Mirolyubov, The Solution of a Certain Class of Linear Difference-Differential Equations [in Russian], Matem. Sb.,34, No. 2, 357-384 (1954).
[4] N. F. Nörlund, Vorlesungen über Differenzenrechnung, Springer, Berlin (1926).
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