feat(MeasureTheory): prove elementary and Jordan product measures - #665

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teorth merged 8 commits into

teorth:mainfrom

Chessing234:measure-elementary-prod

Sep 5, 2026

Commits on Aug 25, 2026

feat(MeasureTheory): prove the product of elementary sets is elementary
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2ebb2a1
feat(MeasureTheory): prove Jordan measure is multiplicative on products
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d03b804
fix(MeasureTheory): close the product lemmas without convert/simp loops
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50630c0
fix(MeasureTheory): avoid dependent rewrites in the product lemmas
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022f962
fix(MeasureTheory): match prod_equiv toFun indices in the product lemmas
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4a21fb4
fix(MeasureTheory): rewrite the product-box side via Fin.eq_of_val_eq
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5205895
fix(MeasureTheory): control the product error with a δ that scales with the measures
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930f9d1

Commits on Aug 29, 2026

fix prod norm proof to match Fin.castAdd/natAdd indices
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f018a92