On Ulam Stability of Functional Equations in 2-Normed Spaces—A Survey

The theory of Ulam stability was initiated by a problem raised in 1940 by S. Ulam and concerning approximate solutions to the equation of homomorphism in groups. It is somehow connected to various other areas of investigation such as, e.g., optimization and approximation theory. Its main issue is th...

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Auteurs principaux: Anna Bahyrycz, Janusz Brzdęk, El-sayed El-hady, Zbigniew Leśniak
Format: article
Langue:EN
Publié: MDPI AG 2021
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Accès en ligne:https://doaj.org/article/3680c80f6fec4e16ad02d7e80720cc10
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