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[Merged by Bors] - chore: get rid of erws in Mathlib.Algebra.Group.InjSurj #17569

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[Merged by Bors] - chore: get rid of erws in Mathlib.Algebra.Group.InjSurj #17569

wants to merge 1 commit into from

Commits on Oct 9, 2024

  1. chore: get rid of erws in Mathlib.Algebra.Group.InjSurj 

    Almost all of the `erw`s are actually just `rw`s. Only two places need additional rewriting: this is because the `pow_succ'` field of `DivInvMonoid`s mentions `Int.ofNat`, which is not reducibly defeq to the actual cast we use in our lemmas.

This suggests we should redefine `pow_succ'` to use the actual cast instead.
    @Vierkantor
    Vierkantor committed Oct 9, 2024
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