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Fill the additive commutative monoid instance for finitely additive measures - #697

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Chessing234:feat/fam-add-comm-monoid
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Fill the additive commutative monoid instance for finitely additive measures#697
Chessing234 wants to merge 1 commit into
teorth:mainfrom
Chessing234:feat/fam-add-comm-monoid

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@Chessing234

@Chessing234 Chessing234 commented Sep 7, 2026

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Summary

  • Addition of finitely additive measures is pointwise on EReal-valued set functions, so the monoid laws follow from those of EReal (proof fields are irrelevant).

Test plan

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

…easures.

Addition is pointwise on EReal-valued set functions, so the monoid laws follow from those of EReal.
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