### A transversal of full outer measure

by Kumar and Shelah. [KmSh:1068]

Advances in Math, 2017

We prove that for any set of real and equivalence relations
on
it
such that every equivalence class is countable, there is a
transversal
(= a set of representations of the equivalence relations, i.e.
having
exactly one member in each equivalence class) with the same
outer
measure.

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