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[Merged by Bors] - feat(Algebra/Algebra/Lie): max nilpotent ideal <= radical#22140

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[Merged by Bors] - feat(Algebra/Algebra/Lie): max nilpotent ideal <= radical#22140
jano-wol wants to merge 42 commits intomasterfrom
janos-wolosz/lie-albegra-nilradical

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Show that max nilpotent ideal <= radical for Lie algebras

This PR establishes that the max nilpotent ideal is contained in the radical for Lie algebras.
A somewhat similar result is already presented in Nilpotent.lean, where it is shown that the center is contained in the max nilpotent ideal for Lie algebras.

This work is part of the framework:
Classification of semisimple Lie algebras

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@github-actions github-actions bot added the new-contributor This PR was made by a contributor with at most 5 merged PRs. Welcome to the community! label Feb 20, 2025
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github-actions bot commented Feb 20, 2025

PR summary 9e4344dc22

Import changes for modified files

No significant changes to the import graph

Import changes for all files
Files Import difference

Declarations diff

+ instance [IsNilpotent L I] : LieRing.IsNilpotent I := by
+ maxNilpotentIdeal_le_radical

You can run this locally as follows
## summary with just the declaration names:
./scripts/declarations_diff.sh <optional_commit>

## more verbose report:
./scripts/declarations_diff.sh long <optional_commit>

The doc-module for script/declarations_diff.sh contains some details about this script.


No changes to technical debt.

You can run this locally as

./scripts/technical-debt-metrics.sh pr_summary
  • The relative value is the weighted sum of the differences with weight given by the inverse of the current value of the statistic.
  • The absolute value is the relative value divided by the total sum of the inverses of the current values (i.e. the weighted average of the differences).

@github-actions github-actions bot added the t-algebra Algebra (groups, rings, fields, etc) label Feb 20, 2025
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Thanks!

Please apply the suggestions and then feel free to merge :)

bors d+

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mathlib-bors bot commented Feb 20, 2025

✌️ jano-wol 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 Feb 20, 2025
jano-wol and others added 2 commits February 20, 2025 22:28
Co-authored-by: Oliver Nash <[email protected]>
Co-authored-by: Oliver Nash <[email protected]>
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bors r+

mathlib-bors bot pushed a commit that referenced this pull request Feb 20, 2025
Show that max nilpotent ideal <= radical for Lie algebras


Co-authored-by: jano-wol <[email protected]>
Co-authored-by: Andrzej Polak <[email protected]>
Co-authored-by: janowol <[email protected]>
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mathlib-bors bot commented Feb 20, 2025

Pull request successfully merged into master.

Build succeeded:

@mathlib-bors mathlib-bors bot changed the title feat(Algebra/Algebra/Lie): max nilpotent ideal <= radical [Merged by Bors] - feat(Algebra/Algebra/Lie): max nilpotent ideal <= radical Feb 20, 2025
@mathlib-bors mathlib-bors bot closed this Feb 20, 2025
@mathlib-bors mathlib-bors bot deleted the janos-wolosz/lie-albegra-nilradical branch February 20, 2025 21:54
Julian added a commit that referenced this pull request Feb 21, 2025
* origin/master: (823 commits)
  chore(Computability): fix naming of lemmas about Sum.inl, Sum.inr, Sum.casesOn (#22156)
  feat: `Fintype Ordering` (#22154)
  chore: more renamings to fit the naming convention (#22148)
  feat(CategoryTheory): any monomorphism in a Grothendieck abelian category is a transfinite composition of pushouts of monomorphisms in a small family (#22157)
  chore: rename `{Continuous., continuous_}sum_map` to `sumMap` (#22155)
  chore: remove initial space followed by `-/` (#22158)
  chore: make arg in HeightOneSpectrum.valuation explicit (#22139)
  feat(Data/List): `List.maximum` is monotone (#22091)
  chore(Combinatorics/SimpleGraph): extract WalkDecomp from Walk (#21981)
  feat: if a monoid M acts, then so does (s : S) with [SubmonoidClass S M] (#21123)
  chore: backport changes to `getElem` lemmas (#22146)
  feat(CategoryTheory): generating monomorphisms in Grothendieck abelian categories (#22150)
  feat: rename variables to fit doc (#22143)
  feat(CategoryTheory): IsDetecting.isIso_iff_of_mono (#22135)
  feat(CategoryTheory): truncations of transfinite compositions (#22149)
  chore: simplify a proof (#22134)
  feat(CategoryTheory): monomorphisms are stable under coproducts in Grothendieck abelian categories (#22133)
  feat(Order): Set.Ici.isSuccLimit_coe (#22103)
  chore(Analysis/Convex/Normed): split into smaller files (#22015)
  feat(Algebra/Algebra/Lie): max nilpotent ideal <= radical (#22140)
  refactor(LinearIndependent): refactor to use LinearIndepOn (#21886)
  chore: rename some more `Foo.sum_elim` -> `sumElim` (#22130)
  chore: rename Injective.sum_elim and friends (#22129)
  chore: fix naming oversight from #22070 (#22128)
  chore: fix spelling mistakes (#22136)
  feat(RingTheory/Ideal/Quotient): define transtition map between ring or module quotient by powers of ideal (#21900)
  fix: initialize_simps_projections print warning when projection data already exists (#20339)
  chore: rename ContMDiff.sum_{elim,map} (#22131)
  feat(CategoryTheory): characterization of injective objects in terms of lifting properties (#22104)
  chore(Lean,Tactic): un-indent some doc-strings (#22118)
  feat(Algebra/MvPolynomial): add `comp` versions of rename lemmas (#21259)
  chose: add deprecation (#22124)
  feat(CategoryTheory/Abelian/GrothendieckCategory): computing colimits in Subobject (#22123)
  feat(CategoryTheory/Subobject): hasCardinalLT_of_mono (#22122)
  feat: add `DenseRange.piMap` (#22114)
  feat(Algebra/Algebra/Lie): define the maximal nilpotent ideal of Lie algebras (#22061)
  chore(Data/Finset): don't import algebra when defining `Finset.card` (#21866)
  feat: a function on a discrete space is smooth (#22113)
  feat: commutative group objects in additive categories (#21521)
  style(Geometry/Manifold): remove superfluous indentation in doc-strings (#22117)
  chore: rename PushNeg.lean to Push.lean (#22108)
  feat: add Is{Open,Closed}Embedding.sum_elim (#22070)
  feat(RingTheory/Perfectoid): define the untilt map and generalize pretilt (#21563)
  feature(Topology/Algebra/Module/WeakBilin): Linear map from F into the topological dual of E with the weak topology (#21078)
  feat(CategoryTheory/Abelian): the exact sequence attached to a pushout square (#22110)
  chore(ChartedSpace.lean): group constructions together (#22107)
  feat(CategoryTheory/MorphismProperty): more basic API (#22099)
  chore(Data/Fintype): split `Fintype/Card.lean` (#21840)
  chore(SetTheory/Cardinal/Cofinality): make `IsStrongLimit` into a structure (#21971)
  feat(Combinatorics/SimpleGraph): Add a theorem about cliques in induced subgraphs (#20705)
  ...
Julian added a commit that referenced this pull request Feb 22, 2025
* polynomial-sequences: (558 commits)
  Correct the TODO to mention IsCancelAdd which does exist.
  Talk about strict monotonicity instead, thanks @pechersky.
  Mention the TODO on li generalization to semirings.
  One more dedent.
  Same injectivity twiddling for basis.
  nontiviality to simplify this proof, and some dedenting.
  Hopefully more correct injectivity lemmas matching the naming convention.
  Fix the empty docstring.
  Update Mathlib/Algebra/Polynomial/Sequence.lean
  Fix the variable naming.
  Apply suggestions from code review
  chore(Computability): fix naming of lemmas about Sum.inl, Sum.inr, Sum.casesOn (#22156)
  feat: `Fintype Ordering` (#22154)
  chore: more renamings to fit the naming convention (#22148)
  feat(CategoryTheory): any monomorphism in a Grothendieck abelian category is a transfinite composition of pushouts of monomorphisms in a small family (#22157)
  chore: rename `{Continuous., continuous_}sum_map` to `sumMap` (#22155)
  chore: remove initial space followed by `-/` (#22158)
  chore: make arg in HeightOneSpectrum.valuation explicit (#22139)
  feat(Data/List): `List.maximum` is monotone (#22091)
  chore(Combinatorics/SimpleGraph): extract WalkDecomp from Walk (#21981)
  feat: if a monoid M acts, then so does (s : S) with [SubmonoidClass S M] (#21123)
  chore: backport changes to `getElem` lemmas (#22146)
  feat(CategoryTheory): generating monomorphisms in Grothendieck abelian categories (#22150)
  feat: rename variables to fit doc (#22143)
  feat(CategoryTheory): IsDetecting.isIso_iff_of_mono (#22135)
  feat(CategoryTheory): truncations of transfinite compositions (#22149)
  chore: simplify a proof (#22134)
  feat(CategoryTheory): monomorphisms are stable under coproducts in Grothendieck abelian categories (#22133)
  feat(Order): Set.Ici.isSuccLimit_coe (#22103)
  chore(Analysis/Convex/Normed): split into smaller files (#22015)
  feat(Algebra/Algebra/Lie): max nilpotent ideal <= radical (#22140)
  refactor(LinearIndependent): refactor to use LinearIndepOn (#21886)
  chore: rename some more `Foo.sum_elim` -> `sumElim` (#22130)
  chore: rename Injective.sum_elim and friends (#22129)
  chore: fix naming oversight from #22070 (#22128)
  chore: fix spelling mistakes (#22136)
  feat(RingTheory/Ideal/Quotient): define transtition map between ring or module quotient by powers of ideal (#21900)
  fix: initialize_simps_projections print warning when projection data already exists (#20339)
  chore: rename ContMDiff.sum_{elim,map} (#22131)
  feat(CategoryTheory): characterization of injective objects in terms of lifting properties (#22104)
  chore(Lean,Tactic): un-indent some doc-strings (#22118)
  feat(Algebra/MvPolynomial): add `comp` versions of rename lemmas (#21259)
  chose: add deprecation (#22124)
  feat(CategoryTheory/Abelian/GrothendieckCategory): computing colimits in Subobject (#22123)
  feat(CategoryTheory/Subobject): hasCardinalLT_of_mono (#22122)
  feat: add `DenseRange.piMap` (#22114)
  feat(Algebra/Algebra/Lie): define the maximal nilpotent ideal of Lie algebras (#22061)
  chore(Data/Finset): don't import algebra when defining `Finset.card` (#21866)
  feat: a function on a discrete space is smooth (#22113)
  feat: commutative group objects in additive categories (#21521)
  ...
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