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[Merged by Bors] - feat(SetTheory/ZFC/Ordinal): Lean ordinals to ZFC ordinals#26544

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[Merged by Bors] - feat(SetTheory/ZFC/Ordinal): Lean ordinals to ZFC ordinals#26544
vihdzp wants to merge 72 commits intoleanprover-community:masterfrom
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@vihdzp vihdzp commented Jun 30, 2025

We define Ordinal.toZFSet and prove that its outputs are precisely the ZFC ordinals. Moved from #19985.


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@vihdzp vihdzp removed the awaiting-author A reviewer has asked the author a question or requested changes. label Sep 7, 2025
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Looks good to me now!

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Looks overall sensible!

bors d+

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mathlib-bors bot commented Nov 4, 2025

✌️ vihdzp 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 the delegated This pull request has been delegated to the PR author (or occasionally another non-maintainer). label Nov 4, 2025
@mathlib4-merge-conflict-bot mathlib4-merge-conflict-bot added the merge-conflict The PR has a merge conflict with master, and needs manual merging. (this label is managed by a bot) label Nov 19, 2025
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This pull request has conflicts, please merge master and resolve them.

@github-actions github-actions bot removed the merge-conflict The PR has a merge conflict with master, and needs manual merging. (this label is managed by a bot) label Nov 26, 2025
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vihdzp commented Nov 26, 2025

bors r+

mathlib-bors bot pushed a commit that referenced this pull request Nov 26, 2025
We define `Ordinal.toZFSet` and prove that its outputs are precisely the ZFC ordinals. Moved from #19985.
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mathlib-bors bot commented Nov 26, 2025

Pull request successfully merged into master.

Build succeeded:

@mathlib-bors mathlib-bors bot changed the title feat(SetTheory/ZFC/Ordinal): Lean ordinals to ZFC ordinals [Merged by Bors] - feat(SetTheory/ZFC/Ordinal): Lean ordinals to ZFC ordinals Nov 26, 2025
@mathlib-bors mathlib-bors bot closed this Nov 26, 2025
@vihdzp vihdzp deleted the vi.toPSet branch March 14, 2026 01:30
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