In the present paper, we introduce the notion of classes of ρ-upper continuous functions. We show that ρ-upper continuous functions are Lebesgue measurable and, for ρ < 1/2 , may not belong to Baire class 1. We also prove that a function with Denjoy property can be non-measurable.
© 2012 Stanisław Kowalczyk, Katarzyna Nowakowska, published by Slovak Academy of Sciences, Mathematical Institute
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