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Fixed points and the stability of quadratic functional equations. (English) Zbl 1103.39304

Summary: We will present a fixed point method for some stability theorems of functional equations of quadratic type.

MSC:

39B62 Functional inequalities, including subadditivity, convexity, etc.
39B72 Systems of functional equations and inequalities
39B82 Stability, separation, extension, and related topics for functional equations
47H09 Contraction-type mappings, nonexpansive mappings, \(A\)-proper mappings, etc.
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