Results 71 to 80 of about 502 (93)

On Baire measurable solutions of some functional equations

Open Mathematics, 2009
Baron Karol
doaj   +1 more source

Fuzzy stability of a mixed type functional equation

Journal of Inequalities and Applications, 2011
In this paper, we investigate a fuzzy version of stability for the functional equation f ( x + y + z ) - f ( x + y ) - f ( y + z ) - f ( x + z ) + f ( x ) + f ( y ) + f ( z ) = 0 in the sense of Mirmostafaee and Moslehian.
Jin Sun, Lee Yang-Hi
doaj  

Some remarks on the stability of the multi-Jensen equation

Open Mathematics, 2013
Schwaiger Jens
doaj   +1 more source

Commutativity of set-valued cosine families

Open Mathematics, 2014
Smajdor Andrzej, Smajdor Wilhelmina
doaj   +1 more source

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On stability and nonstability of systems of functional equations

Quaestiones Mathematicae, 2021
Madjid Eshaghi, Bahman Hayati, Hamid Khodaei   +2 more
exaly  

Stability of a Jensen type functional equation

Banach Journal of Mathematical Analysis, 2007
Young-Su Lee, Soon-Yeong Chung
exaly  

On some functional equations and their stability

Journal of Interdisciplinary Mathematics, 2020
Abbas Najati, Prasanna K Sahoo
exaly  

Cosine functions revisited

Banach Journal of Mathematical Analysis, 2011
Dilian Yang
exaly  

On a functional equation related to some entropies in information theory

Journal of Discrete Mathematical Sciences and Cryptography, 2018
Dhiraj Kumar Singh, Pranav Dass
exaly  

Almost tri-cubic functions with Lipschitz condition

Tbilisi Mathematical Journal, 2020
Ismail Nikoufar
exaly