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Fill restriction of a finitely additive measure to a measurable subset - #704

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teorth:mainfrom
Chessing234:feat/fam-restrict-subset
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Fill restriction of a finitely additive measure to a measurable subset#704
Chessing234 wants to merge 1 commit into
teorth:mainfrom
Chessing234:feat/fam-restrict-subset

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@Chessing234

@Chessing234 Chessing234 commented Sep 7, 2026

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Summary

  • Restriction to a measurable subset uses restrict_iff so positivity, empty, and finite additivity come from the original measure on the image in X.

Test plan

  • lake build Analysis.MeasureTheory.Section_1_4_3; CI covers the module.

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