[Merged by Bors] - feat(RingTheory): base change of ideal with flat quotients #32806
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Member
erdOne
commented
Dec 12, 2025
erdOne
commented
PR summary 2dbb742038
|
| File | Base Count | Head Count | Change |
|---|---|---|---|
| Mathlib.RingTheory.Flat.Equalizer | 1126 | 1130 | +4 (+0.36%) |
Import changes for all files
| Files | Import difference |
|---|---|
Mathlib.Algebra.Category.Ring.Under.Limits |
1 |
Mathlib.RingTheory.Flat.Equalizer |
4 |
Declarations diff
+ Algebra.kerTensorProductMapIdToAlgHomEquiv
+ Algebra.kerTensorProductMapIdToAlgHomEquiv_symm_apply
+ LinearMap.kerLTensorEquivOfSurjective
+ LinearMap.lTensor_injective_of_exact_of_flat
+ LinearMap.tensorKerEquivOfSurjective_symm_tmul
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
relativevalue is the weighted sum of the differences with weight given by the inverse of the current value of the statistic. - The
absolutevalue is therelativevalue divided by the total sum of the inverses of the current values (i.e. the weighted average of the differences).
36 tasks
jcommelin
reviewed
Jan 6, 2026
Comment on lines
224
to
227
| /-- Given surjection `f : M → N` with `N` flat, then `A ⊗ ker f ≃ ker (A ⊗ f)`. | ||
| Also see `LinearMap.tensorKerEquiv` for the version with `A` flat instead. -/ | ||
| def LinearMap.kerLTensorEquivOfSurjective [Module.Flat R P] | ||
| (f : N →ₗ[R] P) (hf : Function.Surjective f) (A : Type*) [AddCommGroup A] [Module R A] : |
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Please align the variable names in the docstring and the statement.
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✌️ erdOne can now approve this pull request. To approve and merge a pull request, simply reply with |
leanprover-community-mathlib4-bot
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Corrected the surjection description in the comment.
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bors merge |
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Pull request successfully merged into master. Build succeeded: |
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Jan 24, 2026
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