Adaptive multilevel techniques for mixed finite element discretizations of elliptic boundary value problems:

Abstract: "We consider mixed finite element discretizations of linear second order elliptic boundary value problems with respect to an adaptively generated hierarchy of possibly highly nonuniform simplicial triangulations. By a well known postprocessing technique the discrete problem is equival...

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Bibliographische Detailangaben
Hauptverfasser: Hoppe, Ronald H. W. 1951- (VerfasserIn), Wohlmuth, Barbara 1967- (VerfasserIn)
Format: Buch
Sprache:German
Veröffentlicht: München 1994
Schriftenreihe:Technische Universität <München>: TUM-MATH 9411
Schlagworte:
Zusammenfassung:Abstract: "We consider mixed finite element discretizations of linear second order elliptic boundary value problems with respect to an adaptively generated hierarchy of possibly highly nonuniform simplicial triangulations. By a well known postprocessing technique the discrete problem is equivalent to a modified nonconforming discretization which is solved by preconditioned cg-iterations using a multilevel BPX-type preconditioner designed for standard nonconforming approximations. Local refinement of the triangulations is based on an a posteriori error estimator which can be easily derived from superconvergence results. The performance of the preconditioner and the error estimator is illustrated by several numerical examples."
Beschreibung:Literaturverz. S. 26 - 29
Beschreibung:29 S. graph. Darst.

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