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math.GN2015
Nonmeasurable sets and unions with respect to selected ideals especially ideals defined by trees
Robert Ralowski, Szymon Zeberski
In this paper we consider nonmeasurablity with respect to sigma-ideals defined be trees. First classical example of such ideal is Marczewski ideal s_0. We will consider also ideal…
math.GN2015
Some properties of -Luzin sets
Marcin Michalski, Szymon Żeberski
In this paper we consider a notion of -Luzin set which generalizes the classical notion of Luzin set and Sierpi{ń}ski set on Euclidean spaces. We show that there is a…