Geodesic
On the structure of Wiener--Hopf operator corresponding to anisotropic boundary value problem, connected with Helmholtz--Schr\"{o}dinger еquation with the boundary conditions of the first and second type
Proceedings of the Yerevan State University. Physical and mathematical sciences, no. 2 (2011), pp. 22-26.

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In this paper we investigate the Fredholm property of Wiener–Hopf operator for anisotropic boundary value problem for the Helmholtz–Schrödinger equation with the boundary conditions of the first and second type on the line $y=0$.
Keywords: Wiener–Hopf operator, Fredholm property. 
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S. A. Hosseiny Matikolai. On the structure of Wiener--Hopf operator corresponding to anisotropic boundary value problem, connected with Helmholtz--Schr\"{o}dinger еquation with the boundary conditions of the first and second type. Proceedings of the Yerevan State University. Physical and mathematical sciences, no. 2 (2011), pp. 22-26. http://geodesic.mathdoc.fr/item/UZERU_2011_2_a3/

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