The fractal dimension of invariant subsets for piecewise monotonic maps on the interval.
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Hofbauer, F. (1995)
Acta Mathematica Universitatis Comenianae. New Series
Bernard Host, François Parreau (1990)
Colloquium Mathematicae
P. J. Fitzsimmons (1998)
Annales de l'I.H.P. Probabilités et statistiques
Carlos Uzcátegui (1996)
Fundamenta Mathematicae
We prove that the σ-ideal I(E) (of closed smooth sets with respect to a non-smooth Borel equivalence relation E) does not have the covering property. In fact, the same holds for any σ-ideal containing the closed transversals with respect to an equivalence relation generated by a countable group of homeomorphisms. As a consequence we show that I(E) does not have a Borel basis.
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