feat(RingTheory/Smooth): calculate H¹(L) via formally smooth extensions

[erdOne]

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[github-actions]

PR summary 8b7fa3b59f

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference

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Declarations diff

+ Cotangent.map_toInfinitesimal_bijective
+ CotangentSpace.map_toInfinitesimal_bijective
+ H1Cotangent.equiv
+ H1Cotangent.equivOfFormallySmooth
+ H1Cotangent.map_toInfinitesimal_bijective
+ comap_cotangentIdeal
+ equivH1CotangentOfFormallySmooth
+ homInfinitesimal
+ infinitesimal
+ ker_infinitesimal
+ mk_mem_cotangentIdeal
+ range_cotangentToQuotientSquare
+ toInfinitesimal

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.

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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).

[chrisflav]

Thanks!

maintainer merge

[github-actions]

🚀 Pull request has been placed on the maintainer queue by chrisflav.

[jcommelin]

Thanks 🎉

bors merge

[mathlib-bors]

👎 Rejected by label