09-146 Vitali Vougalter, Vitaly Volpert
On the solvability conditions for some non Fredholm operators (315K, pdf) Aug 25, 09
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Abstract. We obtain solvability conditions for some elliptic equations involving non Fredholm operators, which are sums of second order differential operators with the methods of spectral theory and scattering theory for Schroedinger type operators.

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