Results 91 to 100 of about 767 (107)

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

On Baire measurable solutions of some functional equations

Open Mathematics, 2009
Baron Karol
doaj   +1 more source

On the stability of an AQCQ-functional equation in random normed spaces

Journal of Inequalities and Applications, 2011
In this paper, we prove the Hyers-Ulam stability of the following additive-quadratic-cubic-quartic functional equation f ( x + 2 y ) + f ( x - 2 y ) = 4 f ( x + y ) + 4 f ( x - y ) - 6 f ( x ) (1) + f ( 2 y ) + f
Jang Sun Young, Shin Dong Yun, Lee Jung Rye, Park Choonkil   +3 more
doaj  

On the Hyers-Ulam-Rassias stability of a general cubic functional equation

, 2003
K. Jun, Hark-Mahn Kim
semanticscholar   +1 more source

On the Stability of Functional Equations with Square-Symmetric Operation

, 2001
G. Kim
semanticscholar   +1 more source

On the Hyers-Ulam stability of approximately Pexider mappings

, 2008
B. Belaid, E. Elhoucien, T. Rassias
semanticscholar   +1 more source

Commutativity of set-valued cosine families

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

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Stability of the general quintic functional equation

International Journal of Mathematical Analysis, 2021
The general quintic functional equation is a generalization of many functional equations such as the additive, the general quadratic, the general cubic, and the general quartic functional equation.
S. Jin, Yang-Hi Lee
semanticscholar   +1 more source

GENERALIZED HYERS-ULAM-RASSIAS TYPE STABILITY OF THE 2k-VARIABLE ADDITIVE FUNCTIONAL INEQUALITIES IN NON-ARCHIMEDEAN BANACH SPACES AND BANACH SPACES

International Journal of Mathematics Trends and Technology, 2021
In this paper we use the direct method to proved two the generalized additive functional inequalities with 2k-variables and their Hyers-Ulam-Rassias stability.
L. An
semanticscholar   +1 more source