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[Merged by Bors] - port: Algebra.Order.Monoid.NatCast#893

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[Merged by Bors] - port: Algebra.Order.Monoid.NatCast#893
kim-em wants to merge 4 commits intomasterfrom
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@kim-em kim-em commented Dec 7, 2022

Ported by hand from current mathlib: 07fee0ca54c320250c98bacf31ca5f288b2bcbe2

This is thoroughly ridiculous, but it my fault for merging leanprover-community/mathlib3#17820, see discussion on zulip.

Rather than proving 1 + 1 = 2 (I feel ridiculous), these lemmas should just happen later in mathlib, with stronger typeclasses. But these files are holding up the port, so its better to get this ported as is, and we can make it more sensible later...

@kim-em kim-em added the mathlib-port This is a port of a theory file from mathlib. label Dec 7, 2022
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bors merge

@github-actions github-actions bot added ready-to-merge This PR has been sent to bors. and removed awaiting-review labels Dec 7, 2022
bors bot pushed a commit that referenced this pull request Dec 7, 2022
Ported by hand from current mathlib: 07fee0ca54c320250c98bacf31ca5f288b2bcbe2

This is thoroughly ridiculous, but it my fault for merging leanprover-community/mathlib3#17820, see discussion on [zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/OfNat).

Rather than proving 1 + 1 = 2 (I feel ridiculous), these lemmas should just happen later in mathlib, with stronger typeclasses. But these files are holding up the port, so its better to get this ported as is, and we can make it more sensible later...

Co-authored-by: Scott Morrison <scott.morrison@gmail.com>
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bors bot commented Dec 7, 2022

Pull request successfully merged into master.

Build succeeded:

@bors bors bot changed the title port: Algebra.Order.Monoid.NatCast [Merged by Bors] - port: Algebra.Order.Monoid.NatCast Dec 7, 2022
@bors bors bot closed this Dec 7, 2022
@bors bors bot deleted the monoid_nat_cast branch December 7, 2022 15:23
bors bot pushed a commit to leanprover-community/mathlib3 that referenced this pull request Dec 8, 2022
Regenerated from the [port status wiki page](https://github.com/leanprover-community/mathlib/wiki/mathlib4-port-status).
Relates to the following PRs:
* `algebra.euclidean_domain.defs`: leanprover-community/mathlib4#871
* `algebra.group.ext`: leanprover-community/mathlib4#850
* `algebra.group_power.basic`: leanprover-community/mathlib4#874
* `algebra.hom.equiv.units.basic`: leanprover-community/mathlib4#895
* `algebra.hom.equiv.units.group_with_zero`: leanprover-community/mathlib4#901
* `algebra.order.group.instances`: leanprover-community/mathlib4#890
* `algebra.order.group.order_iso`: leanprover-community/mathlib4#895
* `algebra.order.group.units`: leanprover-community/mathlib4#898
* `algebra.order.monoid.nat_cast`: leanprover-community/mathlib4#893
* `algebra.order.monoid.type_tags`: leanprover-community/mathlib4#873
* `algebra.order.monoid.units`: leanprover-community/mathlib4#873
* `algebra.order.zero_le_one`: leanprover-community/mathlib4#893
* `combinatorics.quiver.push`: leanprover-community/mathlib4#868
* `control.traversable.basic`: leanprover-community/mathlib4#788
* `data.sum.order`: leanprover-community/mathlib4#880
* `group_theory.group_action.option`: leanprover-community/mathlib4#884
* `group_theory.group_action.sigma`: leanprover-community/mathlib4#885
* `group_theory.group_action.sum`: leanprover-community/mathlib4#882
* `group_theory.group_action.units`: leanprover-community/mathlib4#878
* `order.antisymmetrization`: leanprover-community/mathlib4#876
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