In a recent article A.M. Kagan and G.J.Sz\'ekely introduced a notion of Q-independent and Q-identical distributed random variables. We give a complete description of polynomials which appear in these definitions.
Distributions of the same type: non-equivalence of definitions in the discrete case
Description of the class of probability measures on the group ${\mathbb Z}_2^3$ that have a trivial equivalence class
On the Dimension of Unimodular Discrete Spaces, Part I: Definitions and Basic Properties
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