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Behavior of the solutions of an elliptic boundary value problem in a polygonal or polyhedral domain. (English) Zbl 0361.35022
Proc. 3rd Symp. numer. Solut. partial Differ. Equat., College Park 1975, 207-274 (1976).

35J25 Boundary value problems for second-order elliptic equations
35A15 Variational methods applied to PDEs
65N30 Finite element, Rayleigh-Ritz and Galerkin methods for boundary value problems involving PDEs