Journal of Mathematical Analysis and Applications · 2022 · 18 citations · 23 references
Natural SciencesMathematicsDifferential EquationsDynamical SystemsOptimizationExistence TheoryPartial Differential EquationsSingular Perturbation TheorySystems Of Differential EquationsDegenerate Critical PointsNondegenerate Critical PointsSaddle Point ProblemsSaddle PointsUniqueness In Elliptic Equations
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Positive Solutions of Operator Equations.
A. R. Brodsky, M. A. Krasnosel’skii, Richard E. Flaherty et al. · American Mathematical Monthly · 1967 · 2.1K citations