Is there a set $X \subseteq \mathbb{R}$ such that Lebesgue outer measure is countably additive on subsets of $X$? Of course we also require $X$ to have positive outer measure.
2026-05-05 13:38:40.1777988320
A question about Lebesgue outer measure
154 Views Asked by Bumbble Comm https://math.techqa.club/user/bumbble-comm/detail AtRelated Questions in MEASURE-THEORY
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