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Fill restriction, Dirac, zero and sum of finitely additive measures - #688

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Fill restriction, Dirac, zero and sum of finitely additive measures#688
Chessing234 wants to merge 1 commit into
teorth:mainfrom
Chessing234:feat/finitely-additive-easy-examples

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Summary

  • restrict_alg forwards positivity, empty, and additivity along B' ≤ B.
  • Dirac: positivity and empty set. Zero measure and sums of measures: the EReal arithmetic.

Dirac finite additivity and Lebesgue's own fields are still sorry.

Test plan

  • lake build Analysis.MeasureTheory.Section_1_4_3

Made with Cursor

Restriction, Dirac empty/positivity, zero, and sums follow from the algebra of EReal.
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