manuscripta mathematica · 1989 · 11 citations · 0 references
Natural SciencesMathematicsDynamical SystemsFinite Element AnalysisFinite Element MethodsBoundary ConditionsBoundary-value ProblemsOperator TheoryPartial Differential EquationsWeak ConvergenceWeak FormulationElliptic Boundary-value ProblemsElliptic FunctionsElliptic Partial Differential EquationsWeak Boundary ConditionsWeak Solutions