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On the indefinite Helmholtz equation: Complex stretched absorbing boundary layers, iterative analysis, and preconditioning

Numerical AnalysisSpectral TheoryMethod Of Fundamental SolutionEngineeringPhysicsFree Boundary ProblemBoundary LayersNumerical SimulationInverse ProblemsNonlinear Hyperbolic ProblemIndefinite Helmholtz EquationIterative AnalysisBoundary Element MethodNumerical Method For Partial Differential Equation