Results 41 to 50 of about 4,236,155 (127)

An alternative Jensen's functional equation on semigroups [PDF]

open access: yesScienceAsia, 2012
We study the alternative Jensen's functional equation f(x) 2f(xy) + f(xy 2 ) = 0 when f is a ...
openaire   +1 more source

Stability of Jensen functional equation on semigroups

open access: yesJournal of Mathematical Analysis and Applications, 2010
A real function \(f\) defined on a semigroup \(S\) is Jensen if it satisfies the functional equation \(f(xyz)+f(xzy)+2f(x)-2f(xy)-2f(xz)=0\). In this paper, the authors investigate the Hyers-Ulam stability of the above equation and prove that each semigroup can be embedded into a semigroup such that the equation above is stable.
Faĭziev, Valeriĭ A., Riedel, Thomas
openaire   +2 more sources

On a Sum Form Functional Equation Related to Various Nonadditive Entropies in Information Theory

open access: yes, 2016
[[abstract]]In this paper, the general solutions of a sum form functional equation containing four unknown mappings have been obtained without imposing any regularity condition on any of the four mappings.
Dhiraj Kumar Singh, Prem Nath
core  

GENERALIZED JENSEN'S FUNCTIONAL EQUATIONS AND APPROXIMATE ALGEBRA HOMOMORPHISMS

open access: yesBulletin of the Korean Mathematical Society, 2002
The generalized Hyers-Ulam-Rassias stability of the functional equation \[ 2^nf\biggl({{x_1+\dots+x_{2^n}}\over{2^n}}\biggr)=\sum_{i=1}^{2^n}f(x_i)\tag{1} \] is proved in Banach modules over a~unital \(C^{\ast}\)-algebra. The Hyers-Ulam-Rassias stability of algebra homomorphisms between Banach algebras associated with the functional equation (1) is ...
Bae, Jae-Hyeong, Park, Won-Gil
openaire   +2 more sources

The Jensen functional equation in non‐Archimedean normed spaces [PDF]

open access: yesJournal of Function Spaces, 2009
We investigate the Hyers–Ulam–Rassias stability of the Jensen functional equation in non‐Archimedean normed spaces and study its asymptotic behavior in two directions: bounded and unbounded Jensen differences. In particular, we show that a mapping f between non‐Archimedean spaces with f(0) = 0 is additive if and only if as max {‖x‖, ‖y‖} → ∞.
openaire   +2 more sources

A primer on Variational Laplace (VL). [PDF]

open access: yesNeuroimage, 2023
Zeidman P, Friston K, Parr T.
europepmc   +1 more source

Estimations of f- and Rényi divergences by using a cyclic refinement of the Jensen's inequality

open access: yes, 2019
The Jensen's inequality plays a crucial role to obtain inequalities for divergences between probability distributions. In this paper we introduce a new functional, based on the f-divergence functional, and then we obtain some estimates for the new ...
Horváth, László   +2 more
core   +1 more source

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