Sync upstream mathlib4 (2026-05-11, +5 commits)#4
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I removed 24 unnecessary `set_option` line(s) across 10 file(s).
…uchy sequences in topological groups (#38599) Topological groups had several lemmas about uniform convergence, but were missing a lemma about a sequence being a uniform cauchy sequence. This PR fills that gap. This is a simplifying lemma on the way to Michael's selection theorem. Co-authored-by: Kevin H Wilson <khwilson@gmail.com>
cf. [#mathlib4 > Where should #adaptation_note be imported?](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Where.20should.20.23adaptation_note.20be.20imported.3F/with/593838453)
This PR shows that the association `A → G(k, (A ⊗[R] M); A)` for an `R`-algebra `A` and `R`-module `M` forms a functor. (AI disclosure: an early version of this PR was prepared with the help of Claude)
Follow-up to #38793
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Medium Risk
Medium risk: adds new Grassmannian base-change functoriality built on tensor/base-change isomorphisms, and changes core import/attribute behavior (
Mathlib.Init,Mathlib/Logic/Basic) which can have broad downstream effects.Overview
Adds a base-change map and functorial API for Grassmannians: defines
Module.Grassmannian.mapinduced by an algebra morphism via abaseChangeMkQquotient map, provesmap_id/map_comp, and exposes the resultingModule.Grassmannian.functor : CommAlgCat R ⥤ Type _.Extends tensor/base-change infrastructure to support this: introduces
LinearMap.baseChange_surjective, adds lemmas relatingcancelBaseChangetoTensorProduct.lidand kernel preservation underbaseChange ∘ cancelBaseChange.Broad but mostly mechanical cleanup: makes
#adaptation_noteglobally available by importingMathlib.Tactic.AdaptationNotefromMathlib.Init(and adjustsMathlib/Tactic/AdaptationNoteimports), switchesMathlib/Logic/Basictopublic import Mathlib.Tactic.Attr.Register, removes several localset_option backward.isDefEq.respectTransparency falsewrappers, and tweaks[mono]/[gcongr]tagging on various monotonicity and order lemmas (including adding[gcongr]toIsFractionRing.coeSubmodule_le_coeSubmodule).Reviewed by Cursor Bugbot for commit 9caaa49. Bugbot is set up for automated code reviews on this repo. Configure here.