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[Merged by Bors] - feat: SigmaFinite instances for Measure.withDensity #8271

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If a measure μ is sigma-finite, then μ.withDensity f is sigma-finite for any a.e.-measurable and a.e. finite function f.


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@RemyDegenne RemyDegenne added awaiting-review The author would like community review of the PR t-measure-probability Measure theory / Probability theory labels Nov 8, 2023
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Thanks!

bors merge

@github-actions github-actions bot added ready-to-merge This PR has been sent to bors. and removed awaiting-review The author would like community review of the PR labels Nov 8, 2023
mathlib-bors bot pushed a commit that referenced this pull request Nov 8, 2023
If a measure `μ` is sigma-finite, then `μ.withDensity f` is sigma-finite for any a.e.-measurable and a.e. finite function `f`.
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mathlib-bors bot commented Nov 8, 2023

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bors d+

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mathlib-bors bot commented Nov 8, 2023

✌️ RemyDegenne can now approve this pull request. To approve and merge a pull request, simply reply with bors r+. More detailed instructions are available here.

mathlib-bors bot pushed a commit that referenced this pull request Nov 8, 2023
If a measure `μ` is sigma-finite, then `μ.withDensity f` is sigma-finite for any a.e.-measurable and a.e. finite function `f`.
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mathlib-bors bot commented Nov 8, 2023

Build failed (retrying...):

mathlib-bors bot pushed a commit that referenced this pull request Nov 8, 2023
If a measure `μ` is sigma-finite, then `μ.withDensity f` is sigma-finite for any a.e.-measurable and a.e. finite function `f`.
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mathlib-bors bot commented Nov 8, 2023

Build failed (retrying...):

mathlib-bors bot pushed a commit that referenced this pull request Nov 8, 2023
If a measure `μ` is sigma-finite, then `μ.withDensity f` is sigma-finite for any a.e.-measurable and a.e. finite function `f`.
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mathlib-bors bot commented Nov 8, 2023

Pull request successfully merged into master.

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@mathlib-bors mathlib-bors bot changed the title feat: SigmaFinite instances for Measure.withDensity [Merged by Bors] - feat: SigmaFinite instances for Measure.withDensity Nov 8, 2023
@mathlib-bors mathlib-bors bot closed this Nov 8, 2023
@mathlib-bors mathlib-bors bot deleted the RD_withDensity branch November 8, 2023 22:44
grunweg pushed a commit that referenced this pull request Dec 15, 2023
If a measure `μ` is sigma-finite, then `μ.withDensity f` is sigma-finite for any a.e.-measurable and a.e. finite function `f`.
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