On Approximately of a $$\sigma -$$σ-Quadratic Functional Equation on a Set of Measure Zero
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DOI: 10.1007/s11785-016-0594-8
Abstract: Let $${\mathbb {C}}$$C be the set of complex numbers, X be a normed space and Y be a Banach space. We investigate the Hyers-Ulam stability theorem when $$f:{\mathbb {C}}\rightarrow Y$$f:C→Y satisfy the following $$\sigma -$$σ-quadratic… read more here.
Keywords: sigma quadratic; measure; functional equation; approximately sigma ... See more keywords