chore: remove extra monic hypotheses from divByMonic and modByMonic lemmas

[kckennylau]

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Zulip discussion

[github-actions]

PR summary a73de4ba4b

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

No declarations were harmed in the making of this PR! 🐙

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).

[kbuzzard]

given that github has mangled the diff here anyway (i.e. isn't just saying "you added two lines" it's saying "you deleted a proof and replaced it with what looks to me like a different proof but actually it's the same proof indented two spaces more" you may as well golf this if you can -- can all the unfolds be put into the dsimp and rw?

[kckennylau]

I've golfed it a bit, but the unfold and rw still can't be combined to one line (dsimp doesn't work either)

[kbuzzard]

Nice -- this is clearly better.

[artie2000]

Doesn't look like you missed any lemmas!

[artie2000]

Move divByMonic_eq_of_not_monic and modByMonic_eq_of_not_monic earlier so the non-monic branches you add can be closed in one line?

[kckennylau]

But it is already one line (here), and it already uses divByMonic_eq_of_not_monic and modByMonic_eq_of_not_monic, and what you linked to isn't the non-monic branch, but rather the branch that says "division is done here and you can go home and have dinner"

[artie2000]

my bad!

[artie2000]

LGTM

[jcommelin]

Thanks 🎉

bors merge

[mathlib-bors]

Build failed (retrying...):

• Post-Build Step

[mathlib-bors]

Build failed (retrying...):

• Post-Build Step

[mathlib-bors]

Build failed (retrying...):

• Post-Build Step

[bryangingechen]

I think this is failing: https://github.com/leanprover-community/mathlib4/actions/runs/19569815604/job/56040389958#step:37:20
bors r-
bors d+

[mathlib-bors]

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[mathlib-bors]

Canceled.