Geodesic
Fast decaying potentials on the finite-gap background and the $\bar \partial$-problem on the Riemann surfaces
Teoretičeskaâ i matematičeskaâ fizika, Tome 99 (1994) no. 2, pp. 300-308 Cet article a éte moissonné depuis la source Math-Net.Ru

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The direct and the inverse ‘scattering problems’ for the heat-conductivity operator $L_P=\partial_y-\partial_x^2+u(x,y)$ are studied for the following class of potentials: $u(x,y)=u_0(x,y)+u_1(x,y)$ where $u_0(x,y)$ is a nonsingular real finite-gap potential and $u_1(x,y)$ decays sufficiently fast as $x^2+y^2 \rightarrow \infty$. We show that the ‘scattering data’ for such potentials is the $\bar \partial$-problem data on the Riemann surface corresponding to the potential $u_0(x,y)$. The ‘scattering data’ corresponding to real potentials is characterized and it is proved that the inverse problem corresponding to such data has unique nonsingular solution without the ‘small norm’ assumption. Analogs of these results for the fixed negative energy scattering problem for the two-dimensional time-independent Schrödinger operator $L_P=-\partial _x^2-\partial _y^2+u(x,y)$ are obtained. 
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     title = {Fast decaying potentials on the finite-gap background and the $\bar \partial$-problem on the {Riemann} surfaces},
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}
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P. G. Grinevich. Fast decaying potentials on the finite-gap background and the $\bar \partial$-problem on the Riemann surfaces. Teoretičeskaâ i matematičeskaâ fizika, Tome 99 (1994) no. 2, pp. 300-308. http://geodesic.mathdoc.fr/item/TMF_1994_99_2_a16/

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