Results 71 to 80 of about 566 (104)

An AQCQ-functional equation in paranormed spaces

, 2012
In this article, we prove the Hyers-Ulam stability of an additive-quadratic-cubic-quartic functional equation in paranormed spaces.Mathematics Subject Classification (2010): Primary 39B82; 39B52; 39B72; 46A99.
Choonkill Park, Jung Rye Lee
semanticscholar   +1 more source

On the Mazur--Ulam theorem in fuzzy n--normed strictly convex spaces

, 2009
In this paper, we generalize the Mazur--Ulam theorem in the fuzzy real n-normed strictly convex spaces.Comment: 7 ...
Abbaszadeh, S., Gordji, M. Eshaghi, Rassias, Th. M.   +2 more
core   +1 more source

Fuzzy stability of multi-additive mappings

Demonstratio Mathematica
The main aim of this study is to establish some stability results concerning the multi-additive mappings by applying the so-called direct (Hyers) method and the alternative fixed approach in the setting of fuzzy normed spaces.
Park Choonkil, Bodaghi Abasalt, Donganont Mana   +2 more
doaj   +1 more source

Approximation of additive functional equations in NA Lie C*-algebras

Demonstratio Mathematica, 2018
In this paper, by using fixed point method, we approximate a stable map of higher *-derivation in NA C*-algebras and of Lie higher *-derivations in NA Lie C*-algebras associated with the following additive functional ...
Wang Zhihua, Saadati Reza
doaj   +1 more source

Approximate ternary quadratic derivations on ternary Banach algebras and C*-ternary rings

, 2012
In the current article, we use a fixed point alternative theorem to establish the Hyers-Ulam stability and also the superstability of a ternary quadratic derivation on ternary Banach algebras and C*-ternary rings which is introduced in Shagholi et al ...
A. Bodaghi, I. Alias
semanticscholar   +1 more source

Stability of functional equation obtained through a fixed-point alternative in intuitionistic fuzzy normed spaces

, 2012
In this paper, we determine the stability of a generalized Hyers-Ulam-Rassias-type theorem concerning the additive functional equation 2f(x+y+z2)=f(x)+f(y)+f(z) in the framework of intuitionistic fuzzy normed spaces through the fixed-point alternative ...
S. Mohiuddine, M. Alghamdi
semanticscholar   +1 more source

On the sum form functional equation related to diversity index

Demonstratio Mathematica
The focal point of this article is to study a functional equation of sum form involving four unknown mappings. We primarily concentrate on exploring all possible solutions of the equation.
Singh Dhiraj Kumar, Grover Shveta
doaj   +1 more source

Nonlinear -Fuzzy stability of cubic functional equations

, 2012
We establish some stability results for the cubic functional equations 3fx+ 3y+f3x-y= 15fx+y+ 15fx-y+ 80fy,f2x+y+f2x-y= 2fx+y+ 2fx-y+ 12fx and f3x+y+f3x-y= 3fx+y+ 3fx-y+ 48fx in the setting of various -fuzzy normed spaces that in turn generalize a ...
R. Agarwal, Y. Cho, R. Saadati, Shenghua Wang   +3 more
semanticscholar   +1 more source

Global stability of latency-age/stage-structured epidemic models with differential infectivity. [PDF]

J Math Biol, 2023
Liu X, Chen Y, Li X, Li J.
europepmc   +1 more source

Stability of the Jensen equation in C*-algebras: a fixed point approach

, 2012
Using fixed point method, we prove the Hyers-Ulam stability of homomorphisms in C*-algebras and Lie C*-algebras and also of derivations on C*-algebras and Lie C*-algebras for the Jensen equation.2010 Mathematics Subject Classification: 39B82; 47H10 ...
H. A. Kenary, H. Rezaei, S. Talebzadeh, Choonkill Park   +3 more
semanticscholar   +1 more source