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[Merged by Bors] - feat(measure_theory/interval_integral): weaken assumption in integral_non_ae_measurable #6858

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I don't see any reason for having a strict inequality here.

@benjamindavidson benjamindavidson added the awaiting-review The author would like community review of the PR label Mar 25, 2021
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On second thought, should I just add

lemma integral_non_ae_measurable {f : α → E} {a b}
  (hf : ¬ ae_measurable f (μ.restrict (Ioc (min a b) (max a b)))) :
  ∫ x in a..b, f x ∂μ = 0 :=
by cases le_total a b; simpa [integral_of_le, integral_of_ge, h] using integral_non_ae_measurable hf

from which I can then derive an of_le version?

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urkud commented Mar 25, 2021

On second thought, should I just add

lemma integral_non_ae_measurable {f : α → E} {a b}
  (hf : ¬ ae_measurable f (μ.restrict (Ioc (min a b) (max a b)))) :
  ∫ x in a..b, f x ∂μ = 0 :=
by cases le_total a b; simpa [integral_of_le, integral_of_ge, h] using integral_non_ae_measurable hf

from which I can then derive an of_le version?

Do we ever need this more general lemma? Anyway,
bors d+

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bors bot commented Mar 25, 2021

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

@bryangingechen bryangingechen added delegated The PR author may merge after reviewing final suggestions. and removed awaiting-review The author would like community review of the PR labels Mar 25, 2021
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On second thought, should I just add

lemma integral_non_ae_measurable {f : α → E} {a b}
  (hf : ¬ ae_measurable f (μ.restrict (Ioc (min a b) (max a b)))) :
  ∫ x in a..b, f x ∂μ = 0 :=
by cases le_total a b; simpa [integral_of_le, integral_of_ge, h] using integral_non_ae_measurable hf

from which I can then derive an of_le version?

Do we ever need this more general lemma? Anyway,
bors d+

I'm not sure, but in theory it would be more suitable for the interval_integral lemmas I've been working with which don't make any assumptions about a and b. In this case it anyway feels more proper to me to show the general case and then derive the more practical case from it.

bors r+

bors bot pushed a commit that referenced this pull request Mar 26, 2021
…l_non_ae_measurable` (#6858)

I don't see any reason for having a strict inequality here.
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bors bot commented Mar 26, 2021

Pull request successfully merged into master.

Build succeeded:

@bors bors bot changed the title feat(measure_theory/interval_integral): weaken assumption in integral_non_ae_measurable [Merged by Bors] - feat(measure_theory/interval_integral): weaken assumption in integral_non_ae_measurable Mar 26, 2021
@bors bors bot closed this Mar 26, 2021
@bors bors bot deleted the fixa branch March 26, 2021 11:55
b-mehta pushed a commit that referenced this pull request Apr 2, 2021
…l_non_ae_measurable` (#6858)

I don't see any reason for having a strict inequality here.
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3 participants