Nonlinearity · 1990 · 19 citations · 6 references
Natural SciencesMathematicsDifferential EquationsDynamical SystemsApproximation MethodsControl Of Dynamical SystemsControl SystemsControl TheoryNonlinear ControlOperator TheoryControl Of Differential SystemsControllabilityControllability AnalysisNonlinear ControllabilitySystem Controllability
Sufficient conditions are given for approximate solvability of semilinear operator equations on Hilbert spaces. As a particular case, approximate controllability of a semilinear control system is dealt with.
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Topological Methods in the Theory of Nonlinear Integral Equations.
E. H. Rothe, M. A. Krasnosel’skii, A. H. Armstrong et al. · American Mathematical Monthly · 1968 · 2K citations