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Show the Borel sigma-algebra sits inside the Lebesgue sigma-algebra - #707

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teorth:mainfrom
Chessing234:feat/borel-le-lebesgue
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Show the Borel sigma-algebra sits inside the Lebesgue sigma-algebra#707
Chessing234 wants to merge 1 commit into
teorth:mainfrom
Chessing234:feat/borel-le-lebesgue

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@Chessing234

@Chessing234 Chessing234 commented Sep 7, 2026

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Summary

  • Borel is generated by the opens, and every open set is Lebesgue measurable, so the generated sigma-algebra is contained in Lebesgue.

Test plan

  • lake build Analysis.MeasureTheory.Section_1_4_2; CI covers the module.

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