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[Merged by Bors] - feat(Combinatorics/Enumerative/Bell): sum over partition shapes#39693

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[Merged by Bors] - feat(Combinatorics/Enumerative/Bell): sum over partition shapes#39693
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@yuanyi-350 yuanyi-350 commented May 22, 2026

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Kill TODO in Mathlib/Combinatorics/Enumerative/Bell.lean which proves Nat.bell as a sum of Multiset.bell over partition shapes


Migrated from #37690

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@YaelDillies YaelDillies left a comment

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Thanks! 🚀

maintainer merge

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🚀 Pull request has been placed on the maintainer queue by YaelDillies.

@mathlib-triage mathlib-triage Bot added the maintainer-merge A reviewer has approved the changed; awaiting maintainer approval. label May 26, 2026
Comment thread Mathlib/Combinatorics/Enumerative/Bell.lean Outdated
Comment thread Mathlib/Combinatorics/Enumerative/Bell.lean Outdated
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yuanyi-350 requested a review from eric-wieser June 23, 2026 10:00
Comment thread Mathlib/Combinatorics/Enumerative/Bell.lean Outdated
Comment thread Mathlib/Combinatorics/Enumerative/Partition/Basic.lean Outdated
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yuanyi-350 requested a review from wwylele June 28, 2026 14:30
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yuanyi-350 requested a review from faenuccio July 3, 2026 04:11
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thanks

bors r+

@mathlib-bors mathlib-bors Bot added the ready-to-merge This PR has been sent to bors. label Jul 3, 2026
@mathlib-triage mathlib-triage Bot removed the maintainer-merge A reviewer has approved the changed; awaiting maintainer approval. label Jul 3, 2026
mathlib-bors Bot pushed a commit that referenced this pull request Jul 3, 2026
Kill TODO in `Mathlib/Combinatorics/Enumerative/Bell.lean` which proves `Nat.bell` as a sum of `Multiset.bell` over partition shapes
@mathlib-bors mathlib-bors Bot added the bors-staging This PR is currently being built by bors on the staging branch. label Jul 3, 2026
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mathlib-bors Bot commented Jul 3, 2026

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@mathlib-bors mathlib-bors Bot changed the title feat(Combinatorics/Enumerative/Bell): sum over partition shapes [Merged by Bors] - feat(Combinatorics/Enumerative/Bell): sum over partition shapes Jul 3, 2026
@mathlib-bors mathlib-bors Bot closed this Jul 3, 2026
@yuanyi-350
yuanyi-350 deleted the Bell branch July 3, 2026 13:56
joelriou pushed a commit to joelriou/mathlib4 that referenced this pull request Jul 4, 2026
…prover-community#39693)

Kill TODO in `Mathlib/Combinatorics/Enumerative/Bell.lean` which proves `Nat.bell` as a sum of `Multiset.bell` over partition shapes
michaellee94 pushed a commit to michaellee94/mathlib4 that referenced this pull request Jul 11, 2026
…prover-community#39693)

Kill TODO in `Mathlib/Combinatorics/Enumerative/Bell.lean` which proves `Nat.bell` as a sum of `Multiset.bell` over partition shapes
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5 participants