[Merged by Bors] - feat(MeasureTheory): remove an AbsolutelyContinuous hypothesis from inv_rnDeriv
#8351
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AbsolutelyContinuous hypothesis from inv_rnDerivAbsolutelyContinuous hypothesis from inv_rnDeriv
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… `inv_rnDeriv` (#8351) In order to remove that hypothesis, we also: - add some basic lemmas about absolute continuity and mutually singular measures. - add HaveLebesgueDecomposition instances - rewrite the proof of `withDensity_rnDeriv_eq` to use the new API instead of unfolding the definitions - generalize `rnDeriv_restrict` and `rnDeriv_withDensity` to possibly different measures
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AbsolutelyContinuous hypothesis from inv_rnDerivAbsolutelyContinuous hypothesis from inv_rnDeriv
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… `inv_rnDeriv` (#8351) In order to remove that hypothesis, we also: - add some basic lemmas about absolute continuity and mutually singular measures. - add HaveLebesgueDecomposition instances - rewrite the proof of `withDensity_rnDeriv_eq` to use the new API instead of unfolding the definitions - generalize `rnDeriv_restrict` and `rnDeriv_withDensity` to possibly different measures
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… `inv_rnDeriv` (#8351) In order to remove that hypothesis, we also: - add some basic lemmas about absolute continuity and mutually singular measures. - add HaveLebesgueDecomposition instances - rewrite the proof of `withDensity_rnDeriv_eq` to use the new API instead of unfolding the definitions - generalize `rnDeriv_restrict` and `rnDeriv_withDensity` to possibly different measures
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… `inv_rnDeriv` (#8351) In order to remove that hypothesis, we also: - add some basic lemmas about absolute continuity and mutually singular measures. - add HaveLebesgueDecomposition instances - rewrite the proof of `withDensity_rnDeriv_eq` to use the new API instead of unfolding the definitions - generalize `rnDeriv_restrict` and `rnDeriv_withDensity` to possibly different measures
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In order to remove that hypothesis, we also:
withDensity_rnDeriv_eqto use the new API instead of unfolding the definitionsrnDeriv_restrictandrnDeriv_withDensityto possibly different measures