Izvestiya of Saratov University.

Mathematics. Mechanics. Informatics

ISSN 1816-9791 (Print)
ISSN 2541-9005 (Online)

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Burlutskaya M. S. Jordan–Dirichlet Theorem for Functional Differential Operator with Involution. Izv. Sarat. Univ. Math. Mech. Inform., 2013, vol. 13, iss. 3, pp. 9-14. DOI: 10.18500/1816-9791-2013-13-3-9-14

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Jordan–Dirichlet Theorem for Functional Differential Operator with Involution

Burlutskaya Marija Shaukatovna, Voronezh State University, Russia

In this paper the problem of decomposability of a function f(x) into Fourier series with respect to the system of eigenfunctions of a functional-differential operator with involution Ly = y′(1 − x) + ®y′(x) + p1(x)y(x) + p2(x)y(1−x), y(0) = °y(1) is investigated. Based on the study of the resolvent of the operator easier and using the method of contour integration of the resolvent, we obtain the sufficient conditions for the convergence of the Fourier series for a function f(x) (analogue of the Jordan–Dirichlet’s theorem).

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