In the books of Boubarki on integration, the autors define $L^\infty$ spaces with the help of locally negligible subsets. In the books of Fremlin (and other classical books), the author does not seem use locally negligible subsets. What is the link between these two approaches (probably in the non-$\sigma$ finite case)?
2026-03-26 04:49:41.1774500581
locally measurable functions
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