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Remarks on the stability of Drygas’ equation and the Pexider-quadratic equation

✍ Scribed by Dilian Yang


Publisher
Springer
Year
2004
Tongue
English
Weight
128 KB
Volume
68
Category
Article
ISSN
0001-9054

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Variations on the Drygas equation and it
✍ Gian-Luigi Forti; Justyna Sikorska 📂 Article 📅 2011 🏛 Elsevier Science 🌐 English ⚖ 221 KB

We study the stability of the Drygas functional equation: mixing the direct method of the proof with the method of the invariant means. Dropping the assumption about the domain to be an Abelian group, we assume that the function we are dealing with is central (i.e., g(xy) = g(yx)), is approximativ