On Generalized Ventcel's Type Boundary Conditions for Laplace Operator in a Bounded Domain
V. Bonnaillie-Noël, M. Dambrine, F. Hérau, G. Vial
Source abstract
Ventcel boundary conditions are second order differential conditions that appear in asymptotic models. Like Robin boundary conditions, they lead to well-posed variational problems under a sign condition of a coefficient. Nevertheless, situations where this condition is violated appeared in several works. The well-posedness of such problems was still open. This manuscript establishes, in the generic case, the existence and uniqueness of the solution for the Ventcel boundary value problem without the sign condition. Then we consider perforated geometries and give conditions to remove the genericity restriction.
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