[Merged by Bors] - chore(measure_theory/integral/lebesgue): use to_additive when declaring instances and basic lemmas about simple functions #12000
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| @[to_additive] instance [monoid β] : monoid (α →ₛ β) := | ||
| function.injective.monoid (λ f, show α → β, from f) coe_injective coe_one coe_mul |
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It would probably be wise to use function.injective.monoid_pow here eventually to avoid diamonds, but that's only in scope for this PR if you want it to be.
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…ng instances and basic lemmas about simple functions (#12000) I also grouped similar lemmas together and added one or two missing ones.
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I also grouped similar lemmas together and added one or two missing ones.