Note on the equation (...-...)f = 0.
On Two Functional Equations Connected with a Mean-Value Property of Polynomials
On Two Functional Equations Connected with a Mean-Value Property of Polynomials (Short Communication)
On the general solution of the triangle mean value equation. (Short Communication).
Note on the equation ... f = 0 (Short Communication).
On the general solution of a nonsymmetric partial difference functional equation analogous to the wave equation.
On the general solution of the triangle mean value equation.
Multiple integrals evaluated by functional equations
A note on a pentomino functional equation
Four different unknown functions satisfying the triangle mean value property for harmonic polynomials, II
Four different unknown functions satisfying the triangle mean value property for harmonic polynomials
On an application of hypoellipticity to solutions of functional equations.
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