On Dirichlet problems using subspaces with nearly zero boundary conditions. (English) Zbl 0271.65059

Math. Found. finite Elem. Method Appl. part. differ. Equations, Sympos. Univ. Maryland, Baltimore 1972, 603-627 (1972).


65N30 Finite element, Rayleigh-Ritz and Galerkin methods for boundary value problems involving PDEs
35J25 Boundary value problems for second-order elliptic equations
35D05 Existence of generalized solutions of PDE (MSC2000)
35B45 A priori estimates in context of PDEs
35A35 Theoretical approximation in context of PDEs