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Publicado en línea: 30 dic 2015
Páginas: 81 - 104
Recibido: 04 feb 2015
DOI: https://doi.org/10.1515/aupcsm-2015-0007
© by Zenon Moszner
This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 International License.
We consider the stability, the superstability and the inverse stability of the functional equations with squares of Cauchy’s, of Jensen’s and of isometry equations and the stability in Ulam-Hyers sense of the alternation of functional equations and of the equation of isometry.