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On the Ulam stability of mixed type mappings on restricted domains. (English) Zbl 1021.39015

The author investigates the stability of several functional equations characterizing additive and quadratic mappings on unrestricted but also restricted domains.
Reviewer: J.Schwaiger (Graz)

MSC:

39B82 Stability, separation, extension, and related topics for functional equations
39B52 Functional equations for functions with more general domains and/or ranges
47H99 Nonlinear operators and their properties
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References:

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