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On the lack of equi-measurability for certain sets of Lebesgue-measurable functions

  • Marianna Tavernise EMAIL logo , Alessandro Trombetta and Giulio Trombetta
Published/Copyright: November 30, 2017
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Abstract

Let Ω be a Lebesgue-measurable set in ℝn of finite positive Lebesgue measure. In this note we calculate the lack of equi-measurability of the set Kc(Ω), c > 0, of all Lebesgue-measurable functions f : Ω → ℝ such that 0 ≤ fc, a.e. on Ω. From our result we repair a gap in the Example 2.3 of the paper [APPELL, J.—DE PASCALE, E.: Su alcuni parametri connessi con la misura di non compattezza di Hausdorff in spazi di funzioni misurabili, Boll. Un. Mat. Ital. B (6) 3 (1984), 497–515].


Cordially dedicated to Professor Paolo de Lucia on the occasion of his 80th birthday anniversary

Communicated by Anna De Simone


Acknowledgement

The authors thank the anonymous referee for his valuable comments on the manuscript.

References

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Received: 2016-4-22
Accepted: 2017-3-21
Published Online: 2017-11-30
Published in Print: 2017-11-27

© 2017 Mathematical Institute Slovak Academy of Sciences

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