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feat(RingTheory/Localization/BaseChange): tensor product commutes with localizations#37380

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tb65536 wants to merge 7 commits intoleanprover-community:masterfrom
tb65536:tb_locten
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feat(RingTheory/Localization/BaseChange): tensor product commutes with localizations#37380
tb65536 wants to merge 7 commits intoleanprover-community:masterfrom
tb65536:tb_locten

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@tb65536 tb65536 commented Mar 30, 2026

This PR adds a few isomorphisms for tensor products commuting with localizations.

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@tb65536 tb65536 added awaiting-CI This PR does not pass CI yet. This label is automatically removed once it does. t-algebra Algebra (groups, rings, fields, etc) t-ring-theory Ring theory labels Mar 30, 2026
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github-actions bot commented Mar 30, 2026 •
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PR summary 1cc67e6e43

Import changes for modified files

No significant changes to the import graph

Import changes for all files
Files Import difference

Declarations diff

+ localization_tensor_algEquiv
+ localization_tensor_algEquiv_apply_one_tmul
+ localization_tensor_algEquiv_apply_tmul_one
+ tensor_localization_algEquiv
+ tensor_localization_algEquiv_apply_one_tmul
+ tensor_localization_algEquiv_apply_tmul_one

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

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

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

No changes to technical debt.

You can run this locally as

./scripts/reporting/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 removed the awaiting-CI This PR does not pass CI yet. This label is automatically removed once it does. label Mar 30, 2026
robin-carlier
robin-carlier reviewed Apr 3, 2026
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Only very minor comments

@robin-carlier robin-carlier added the awaiting-author A reviewer has asked the author a question or requested changes. label Apr 3, 2026
@tb65536 tb65536 added awaiting-CI This PR does not pass CI yet. This label is automatically removed once it does. and removed awaiting-author A reviewer has asked the author a question or requested changes. labels Apr 3, 2026
@github-actions github-actions bot removed the awaiting-CI This PR does not pass CI yet. This label is automatically removed once it does. label Apr 3, 2026
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t-algebra Algebra (groups, rings, fields, etc) t-ring-theory Ring theory

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