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On the spectrum of the quadratic pencil of differential operators with periodic coefficients on the semi-axis
(SPRINGER INTERNATIONAL PUBLISHING AG, 2015)
In this paper, the spectrum and resolvent of the operator L-lambda generated by the differential expression L-lambda(y) = y '' + q(1)(x)y' + [lambda(2) + lambda q(2)(x) + q(3)(x)] y and the boundary condition y'(0) - hy(0) ...
On the spectrum of the pencil of high order differential operators with almost periodic coefficients
(SPRINGEROPEN, 2015)
In this paper, the spectrum and the resolvent of the operator L-lambda which is generated by the differential expression l(lambda)(y) = y((m)) + Sigma([I])(gamma=1) (Sigma(gamma)(k=0) lambda(k)p(gamma)(X))y((m-gamma)) has ...