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Commits on Feb 10, 2026

• refactor(Data/List/Induction): improve definition of `reverseRecOn` (#33192)

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Commits on Jan 30, 2026

• feat(Data/Nat/Init): add `div`/`mod` extension theorems. (#34201)

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Commits on Dec 5, 2025

• refactor(`Data/List/Sort`): deprecate and replace `List.Sorted` (#30441)

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Commits on Nov 28, 2025

• feat: Fin.find update (#30037)

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• refactor: Change `isChain_get_iff*` lemmas (#32062)

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Commits on Oct 17, 2025

• fix: Improve definition of `SimplexCategoryGenRel.IsAdmissible` (#30586)

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Commits on Jul 4, 2025

• fix: remove explicit `FunLike` instance for `Equiv` (#26220)

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• feat: Add definition of `symmEquiv` (#26170)

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Commits on Jun 26, 2025

• feat(Logic/Equiv/Fin): add `finSumNatEquiv` (#26408)

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Commits on Jun 9, 2025

• fix: Remove lemmas from `Ring/Hom/Basic` (#25447)

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Commits on Jan 27, 2025

• feat(`InformationTheory/Hamming`): Add AddGroup instances (#20994)

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Commits on Jul 10, 2024

• feat(`Data/Fintype/Order`): Slightly strengthen `Fin.completeLinearOrder`. (#14616)

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Commits on Jun 26, 2024

• feat(Data/Fin/Basic): Expand definition of `BoundedOrder` and `Lattice` for `Fin` (#9814)

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• feat(GroupTheory/Perm/Cycle/Factors): Remove finiteness requirement from cycleOf. (#13145)

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Commits on Feb 14, 2024

• feat(GroupTheory/Submonoid/Units): Add `Submonoid.units` and related definitions and lemmas. (#9006)

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Commits on Feb 7, 2024

• feat(Data/Fin/OrderHom): Factor out `succAbove` and `predAbove` from `Data.Fin.Basic`. (#10166)

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• feat(Data/Fin/Basic): Rename and extend *_above and _below lemmas (#10163)

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Commits on Feb 1, 2024

• feat(Data/Fin/Basic): Improvement and extension of order results (#10156)

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• feat(Data/Fin/Basic): Add missing `succAbove` and `predAbove` lemmas and refactor existing ones. (#10042)

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Commits on Jan 17, 2024

• fix(Data/Fin/Basic): Change definition of `predAbove` to use `castPred` (#9791)

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• fix(Data/Fin/Basic): Redefine `succAbove` (#9793)

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Commits on Jan 16, 2024

• fix(Data/Fin/Basic): `castPred` consistency redefinition. (#9780)

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Commits on Jan 12, 2024

• feat(Order/Basic): Add `ltByCases` API (#9114)

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Commits on Dec 21, 2023

• fix(Data/Option/Defs): Remove `Option.rel` and `Option.maybe`, superceded by std4 (#9178)

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Commits on Dec 17, 2023

• feat(Data/Sum/Basic): Add `LiftRel` lemmas. (#6729)

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Commits on Dec 1, 2023

• feat(*/Equiv/*): Add `symm_bijective` lemmas next to `symm_symm`s (#8444)

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Commits on Sep 7, 2023

• feat(LinearAlgebra/Lagrange): Generalize typeclasses. (#6714)

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Commits on Sep 6, 2023

• feat(Data/Sum/Basic): create direct versions of get(Left|Right)? analogous to Option.get (#6663)

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• fix(Logic/Equiv/Basic): Make use of Bool in equivs consistent. (#6736)

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Commits on Aug 18, 2023

• fix(Data/Sum/Basic): Add ? to Sum-get function names. (#6665)

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