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[Merged by Bors] - chore: Move MulOpposite.op_pow#9442

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[Merged by Bors] - chore: Move MulOpposite.op_pow#9442
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These lemmas can actually be proved much earlier than they were.

Part of #9411


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These lemmas can actually be proved much earlier than they were.

Part of #9411
@YaelDillies YaelDillies added awaiting-review t-algebra Algebra (groups, rings, fields, etc) easy < 20s of review time. See the lifecycle page for guidelines. labels Jan 4, 2024
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Thanks 🎉

If CI passes, please remove the label awaiting-CI and merge this yourself, by adding a comment bors r+.

bors d+

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mathlib-bors bot commented Jan 4, 2024

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

@ghost ghost added delegated This pull request has been delegated to the PR author (or occasionally another non-maintainer). and removed awaiting-review labels Jan 4, 2024
@jcommelin jcommelin added awaiting-review awaiting-CI This PR does not pass CI yet. This label is automatically removed once it does. and removed delegated This pull request has been delegated to the PR author (or occasionally another non-maintainer). labels Jan 4, 2024
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bors merge

mathlib-bors bot pushed a commit that referenced this pull request Jan 4, 2024
These lemmas can actually be proved much earlier than they were.

Part of #9411
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mathlib-bors bot commented Jan 4, 2024

Pull request successfully merged into master.

Build succeeded:

@mathlib-bors mathlib-bors bot changed the title chore: Move MulOpposite.op_pow [Merged by Bors] - chore: Move MulOpposite.op_pow Jan 4, 2024
@mathlib-bors mathlib-bors bot closed this Jan 4, 2024
@mathlib-bors mathlib-bors bot deleted the move_op_pow branch January 4, 2024 23:26
mathlib-bors bot pushed a commit that referenced this pull request Jan 30, 2024
`Algebra.GroupPower.Lemmas` used to be a big bag of lemmas that made it there on the criterion that they needed "more imports". This was completely untrue, as all lemmas could be moved to earlier files in PRs:
- #9440
- #9442
- #9443
- #9455
- #9456
- #9457
- #9459
- #9461
- #9463
- #9466
- #9501
- #9502
- #9503
- #9505
- #9551
- #9553
- #9720
- #9739
- #9740
- #9805
- #9806
- and this one

There are several reasons for this:
* Necessary lemmas have been moved to earlier files since lemmas were dumped in `Algebra.GroupPower.Lemmas`
* In the Lean 3 → Lean 4 transition, Std acquired basic `Int` and `Nat` lemmas which let us shortcircuit the part of the algebraic order hierarchy on which the corresponding general lemmas rest
* Some proofs were overpowered
* Some earlier files were tangled and I have untangled them

This PR finishes the job by moving the last few lemmas out of `Algebra.GroupPower.Lemmas`, which is therefore deleted.
mathlib-bors bot pushed a commit that referenced this pull request Jan 30, 2024
`Algebra.GroupPower.Lemmas` used to be a big bag of lemmas that made it there on the criterion that they needed "more imports". This was completely untrue, as all lemmas could be moved to earlier files in PRs:
- #9440
- #9442
- #9443
- #9455
- #9456
- #9457
- #9459
- #9461
- #9463
- #9466
- #9501
- #9502
- #9503
- #9505
- #9551
- #9553
- #9720
- #9739
- #9740
- #9805
- #9806
- and this one

There are several reasons for this:
* Necessary lemmas have been moved to earlier files since lemmas were dumped in `Algebra.GroupPower.Lemmas`
* In the Lean 3 → Lean 4 transition, Std acquired basic `Int` and `Nat` lemmas which let us shortcircuit the part of the algebraic order hierarchy on which the corresponding general lemmas rest
* Some proofs were overpowered
* Some earlier files were tangled and I have untangled them

This PR finishes the job by moving the last few lemmas out of `Algebra.GroupPower.Lemmas`, which is therefore deleted.
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