Concepedia
American Mathematical Monthly · 1967 · 2.1K citations · 0 references
Natural SciencesMathematicsDifferential EquationsBoundary ConditionsBoundary-value ProblemsEigenvalue ProblemsInitial Value ProblemsOperator TheoryPartial Differential EquationsMonotone Operator TheoryMonotone OperatorsOperator InequalitiesPositive OperatorsStationary Solutions