Transactions of the American Mathematical Society · 1956 · 194 citations · 10 references
Natural SciencesMathematicsDifferential EquationsBoundary ConditionsBoundary-value ProblemsInitial Value ProblemsPartial Differential EquationsSystems Of Differential EquationsElliptic Boundary-value ProblemsParabolic Boundary-value ProblemsParabolic Partial Differential Equations
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