Communications on Pure and Applied Mathematics · 1991 · 169 citations · 3 references
Natural SciencesMathematicsDifferential EquationsBoundary ConditionsInverse ProblemsInverse Problems In MechanicsPartial Differential EquationsIll-posed Inverse ProblemsInverse Problem TheoryInverse Problems In Partial Differential Equations
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The Dirichlet Problem for a Hyperbolic Equation
Fritz John · American Journal of Mathematics · 1941 · 102 citations