Analysis and Mathematical Physics · 2022 · 11 citations · 35 references
Natural SciencesPhysicsComplex SystemsBoundary ConditionsComplex DynamicsEigenvalue ProblemsPerturbation TheorySpectral AnalysisSpectral TheoryBoundary Value Eigenvalue ProblemsEigenfunction ExpansionsEigenvalue Spectral AnalysisEigenvalues Of The LaplacianNonlinear Spectral Problems
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Milton Abramowitz, Irene A. Stegun, David S. Miller · Journal of Applied Mechanics · 1965 · 1.7K citations
Herbert Fédérer · Transactions of the American Mathematical Society · 1959 · 884 citations