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[Merged by Bors] - chore: Move lemmas about Int.natAbs and zpowersHom#9806

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move_nat_abs_sq
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[Merged by Bors] - chore: Move lemmas about Int.natAbs and zpowersHom#9806
YaelDillies wants to merge 4 commits intomasterfrom
move_nat_abs_sq

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These can be defined earlier for free.

Part of #9411


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These can be defined earlier for free.

Part of #9411
@YaelDillies YaelDillies added awaiting-review awaiting-CI This PR does not pass CI yet. This label is automatically removed once it does. t-algebra Algebra (groups, rings, fields, etc) labels Jan 17, 2024
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Thanks 🎉

bors merge

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mathlib-bors bot commented Jan 17, 2024

👎 Rejected by label

@ghost ghost added ready-to-merge This PR has been sent to bors. and removed awaiting-review labels Jan 17, 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 17, 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.

@github-actions github-actions bot added the delegated This pull request has been delegated to the PR author (or occasionally another non-maintainer). label Jan 17, 2024
@ghost ghost added the merge-conflict The PR has a merge conflict with master, and needs manual merging. (this label is managed by a bot) label Jan 18, 2024
@ghost ghost removed the merge-conflict The PR has a merge conflict with master, and needs manual merging. (this label is managed by a bot) label Jan 19, 2024
@github-actions github-actions bot removed the awaiting-CI This PR does not pass CI yet. This label is automatically removed once it does. label Jan 19, 2024
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bors merge

mathlib-bors bot pushed a commit that referenced this pull request Jan 20, 2024
These can be defined earlier for free.

Part of #9411
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mathlib-bors bot commented Jan 20, 2024

Pull request successfully merged into master.

Build succeeded:

@mathlib-bors mathlib-bors bot changed the title chore: Move lemmas about Int.natAbs and zpowersHom [Merged by Bors] - chore: Move lemmas about Int.natAbs and zpowersHom Jan 20, 2024
@mathlib-bors mathlib-bors bot closed this Jan 20, 2024
@mathlib-bors mathlib-bors bot deleted the move_nat_abs_sq branch January 20, 2024 11:07
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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