[Merged by Bors] - feat(RingTheory): universal coprime factorization ring

[erdOne]

---

[github-actions]

PR summary 1159dce834

Import changes for modified files

Dependency changes

File	Base Count	Head Count	Change
Mathlib.RingTheory.Polynomial.UniversalFactorizationRing	1504	1531	+27 (+1.80%)
M scripts/count-trans-deps.py
M scripts/count-trans-deps.py
M scripts/count-trans-deps.py

Import changes for all files

Files	Import difference
Mathlib.RingTheory.Polynomial.UniversalFactorizationRing	27

---

Declarations diff

+ UniversalCoprimeFactorizationRing
+ UniversalCoprimeFactorizationRing.factor₁
+ UniversalCoprimeFactorizationRing.factor₁_mul_factor₂
+ UniversalCoprimeFactorizationRing.factor₂
+ UniversalCoprimeFactorizationRing.homEquiv
+ UniversalCoprimeFactorizationRing.homEquiv_comp_fst
+ UniversalCoprimeFactorizationRing.homEquiv_comp_snd
+ UniversalCoprimeFactorizationRing.isCoprime_factor₁_factor₂
+ UniversalFactorizationRing.jacobian_resentation
+ UniversalFactorizationRing.presentation
+ instance : Algebra.Etale R 𝓡' := by
+ isUnit_resultant_iff_isCoprime
+ resultant_eq_zero_iff

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 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).

[jcommelin]

bors d+

[mathlib-bors]

✌️ erdOne can now approve this pull request. To approve and merge a pull request, simply reply with bors r+. More detailed instructions are available here.

[erdOne]

bors merge

[mathlib-bors]

Pull request successfully merged into master.

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