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math.LO2021
Remarks on the existence of measurable selectors
Joanna Jureczko
A classical theorem from measure theory that gives a sufficient condition for a multifunction to have a measurable selection is Kuratowski and Ryll-Nardzewski Selection Theorem. Th…
math.LO2021
A note on asymptotic density
Ryszard Frankiewicz, Joanna Jureczko
It is proved that , where is the ideal of sets of asymptotic density zero, is universal in the sense of embeddings.