@article{Almahalebi_2017, title={Approximate Drygas mappings on a set of measure zero}, volume={35}, url={https://www.revistaproyecciones.cl/index.php/proyecciones/article/view/1230}, DOI={10.4067/S0716-09172016000200007}, abstractNote={<p style="font-size: 13.192px; font-family: verdana, arial;" align="justify"><span style="font-family: verdana; font-size: x-small;">Let R be the set of real numbers, Y be a Banach space and f : R →Y. We prove the Hyers-Ulam stability for the Drygas functional equation</span></p><p style="font-size: 13.192px; font-family: verdana, arial;" align="justify"><span style="font-family: verdana; font-size: x-small;">f (x + y) + f (x - y) = 2f (x) + f (y) + f (-y) for all (x, y) ∈ Ω, where Ω⊂ R<sup>2</sup> is of Lebesgue measure 0.</span></p>}, number={2}, journal={Proyecciones (Antofagasta, On line)}, author={Almahalebi, Muaadh}, year={2017}, month={Mar.}, pages={225-233} }