Solvability conditions for elliptic problems with non-Fredholm operators
Vitaly A Volpert, Bogdan Kaźmierczak, Marc Massot, Z. Peradzyński · Applicationes Mathematicae · 2002
The paper is devoted to solvability conditions for linear elliptic problems with non-Fredholm operators. We show that the operator becomes normally solvable with a finite-dimensional kernel on properly chosen subspaces. In the particular case of a scalar