[Merged by Bors] - feat(Order/Archimedean): WithZero.mulArchimedean_iff

[pechersky]

with the basic instance of WithZero.instMulArchimedean in an earlier file
Now, #synth MulArchimedean ℤₘ₀ works

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[github-actions]

PR summary 4ac0b46a06

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

+ OrderMonoidIso.mulArchimedean
+ WithBot.instArchimedean
+ WithZero.instMulArchimedean
+ WithZero.mulArchimedean_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.

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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).

[YaelDillies]

Thanks!

maintainer delegate

[YaelDillies]

Is it kosher to additivise WithZero to WithBot?

[pechersky]

I don't think so. Because with have LinearOrderedCommGroupWithZero and LinearOrderedAddCommGroupWith**Top**.

[YaelDillies]

Then can you drop the to_additive?

[github-actions]

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

[jcommelin]

Thanks 🎉

bors merge

[mathlib-bors]

Pull request successfully merged into master.

Build succeeded:

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