Caractérisation du module d'une fonction additive à l'aide d'une équation fonctionelle.
Cauchy's equation on ?.
Cauchy's equation on ?: futher results.
Cauchy's equation on ?. (Summary).
Cauchy's functional equation on a restricted domain
Cauchy's functional equation on semigroups
Certain Functional Equations on Groupoids Weaker than Quasigroups
Characterization of functions whose forward differences are exponential polynomials
Given a finite subset of , we study the continuous complex valued functions and the Schwartz complex valued distributions defined on with the property that the forward differences are (in distributional sense) continuous exponential polynomials for some natural numbers .
Christensen measurable solutions of generalized Cauchy functional equations.
Christensen measurable solutions of generalized Cauchy functional equations. (Short Communications).
Commutativity of set-valued cosine families
Let K be a closed convex cone with nonempty interior in a real Banach space and let cc(K) denote the family of all nonempty convex compact subsets of K. If F t: t ≥ 0 is a regular cosine family of continuous additive set-valued functions F t: K → cc(K) such that x ∈ F t(x) for t ≥ 0 and x ∈ K, then .
Complementary permutations for abelian groups.
Complementary permutations for abelian groups. (Summary).
Concerning functional equations of the generalized Bol-Moufang type.
Conditional function equations and orthogonal additivity.
Constructing means on certain continua and functional equations.
Constructing means on certain continua and functional equations. (Short Communication).
Convergence of sequences of iterates of random-valued vector functions
Given a probability space (Ω,, P) and a closed subset X of a Banach lattice, we consider functions f: X × Ω → X and their iterates defined by f¹(x,ω) = f(x,ω₁), , and obtain theorems on the convergence (a.s. and in L¹) of the sequence (fⁿ(x,·)).
Correction to "On a functional equation arising from hyperbolic geometry", Volume 21 (1980), 113-116.
Cyclic complex vector functional equations.