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feat(Algebra/IndEtale): fill basic lemmas#27

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chrisflav-agents:pr/ind-etale
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feat(Algebra/IndEtale): fill basic lemmas#27
chrisflav wants to merge 3 commits intochrisflav:masterfrom
chrisflav-agents:pr/ind-etale

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@chrisflav chrisflav commented Mar 17, 2026

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orchestra polish

@chrisflav chrisflav changed the title feat(Algebra/IndZariski): fill basic instances and flatness feat(Algebra/IndEtale): fill basic lemmas Mar 27, 2026
Comment thread Proetale/Algebra/IndEtale.lean Outdated
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Comment thread Proetale/Algebra/IndEtale.lean
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Comment thread Proetale/Algebra/IndEtale.lean
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orchestra address review

- Extract Algebra.IsLocalIso.etale lemma and make it public
- Add CommAlgCat.finitePresentation and refactor to use it
- Simplify indEtale_respectsIso proof
- Use MorphismProperty.ind_ind directly in iff_ind_indEtale

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Comment thread Proetale/Algebra/IndEtale.lean Outdated
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orchestra address review

- Change finitePresentation_le_isFinitelyPresentable to equality
- Make isLocalIso_le_etale public
- Revert unrelated changes in iff_ind_etale
- Simplify isStableUnderBaseChange proof
- Simplify indEtale_respectsIso proof
- Use MorphismProperty.ind_ind directly in iff_ind_indEtale

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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