Monday, July 22, 2013

1307.5141 (R. G. Novikov et al.)

Two-dimensional von Neumann--Wigner potentials with a multiple positive

R. G. Novikov, I. A. Taimanov, S. P. Tsarev
By the Moutard transformation method we construct two-dimensional Schrodinger operators with real smooth potential decaying at infinity and with a multiple positive eigenvalue. These potentials are rational functions of spatial variables and their sines and cosines.
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