Displaying similar documents to “A remark on the regularity at the boundary for solutions of elliptic equations”

Deficient Coerciveness Estimate for an Abstract Differential Equation with a Parameter Dependent Boundary Conditions

Aissa Aibeche, Angelo Favini, Chahrazed Mezoued (2007)

Bollettino dell'Unione Matematica Italiana

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In this paper we consider an abstract elliptic differential problem where the equation and the boundary conditions may contain a spectral parameter. We first prove that this problem generates an isomorphism between appropriate spaces and we establish a more precise estimate called coerciveness estimate with defect. The results obtained are applied to study some classes of elliptic, and also possibly degenerate, problems.