On an alternative Cauchy equation.
On an alternative Cauchy equation in two unknown functions. Some classes of solutions.
On an alternative functional equation.
On an alternative functional equation related to the Cauchy equation. (Short Communication).
On an alternative functional equation related to the Cauchy equation.
On an application of hypoellipticity to solutions of functional equations.
On an Application of the 'Square' Functional Equation to a Geometrie Characterization of Quadratic Functions from the Standpoint of Conformal-Mapping Properties
On an elementary inclusion problem and generalized weighted quasi-arithmetic means
The aim of this note is to characterize the real coefficients p₁,...,pₙ and q₁,...,qₖ so that be valid whenever the vectors x₁,...,xₙ, y₁,...,yₖ satisfy y₁,...,yₖ ⊆ convx₁,...,xₙ. Using this characterization, a class of generalized weighted quasi-arithmetic means is introduced and several open problems are formulated.
On an equation of information theory.
On an equation of linear iteration.
On an exponential-cosine operator-valued functional equation.
On an Exponential-Cosine Operator-Valued Functional Equation. (Short Communication).
On an exponential-type fuzzy difference equation.
On an inequality of Kolmogorov type for a second-order difference expression.
On an open problem regarding an integral inequality.
On application of symmetrical functions of several variables to solving some functional equations
In this work we apply the method of a unique partition of a complex function of complex variables into symmetrical functions to solving a certain type of functional equations.
On approximate -ternary -homomorphisms: A fixed point approach.
On approximate cubic homomorphisms.
On approximate solutions of a functional equation in the class of differentiable functions
On approximate solutions of a system of functional equations