Geodesic
Eigenfunctions of negative spectrum for the Schrödinger operator in a halfplane having singular potential on a ray and with Neumann boundary condition
Zapiski Nauchnykh Seminarov POMI, Mathematical problems in the theory of wave propagation. Part 50, Tome 493 (2020), pp. 232-258 Cet article a éte moissonné depuis la source Math-Net.Ru

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In this work eigenfunctions of essential and discrete spectrum are constructed. Integral representations and asymptotics of the eigenfunctions at far distances are obtained. 
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     title = {Eigenfunctions of negative spectrum for the {Schr\"odinger} operator in a halfplane having singular potential on a ray and with {Neumann} boundary condition},
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M. A. Lyalinov. Eigenfunctions of negative spectrum for the Schrödinger operator in a halfplane having singular potential on a ray and with Neumann boundary condition. Zapiski Nauchnykh Seminarov POMI, Mathematical problems in the theory of wave propagation. Part 50, Tome 493 (2020), pp. 232-258. http://geodesic.mathdoc.fr/item/ZNSL_2020_493_a15/

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