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Noncompactness principles in nonlinear operator approximation theory. (English) Zbl 0498.47024


MSC:

47H09 Contraction-type mappings, nonexpansive mappings, \(A\)-proper mappings, etc.
47H10 Fixed-point theorems
34G20 Nonlinear differential equations in abstract spaces
47J05 Equations involving nonlinear operators (general)
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