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The product formula. (English) Zbl 0807.47049

The author proves a product formula for the topological degree of the composition of an \(A\)-proper map and a compact perturbation of the identity.

MSC:

47H11 Degree theory for nonlinear operators
47H09 Contraction-type mappings, nonexpansive mappings, \(A\)-proper mappings, etc.
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