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chore(SetTheory/Ordinal/FixedPointApproximants): simpler definition for lfpApprox#37383

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vihdzp:lfpapprox
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chore(SetTheory/Ordinal/FixedPointApproximants): simpler definition for lfpApprox#37383
vihdzp wants to merge 4 commits intoleanprover-community:masterfrom
vihdzp:lfpapprox

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@vihdzp vihdzp commented Mar 30, 2026

We simplify the definition of Ordinal.lfpApprox - the old definition wasn't even simp-normal. We then golf the entire API using it.


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@vihdzp vihdzp added t-order Order theory t-set-theory Set theory labels Mar 30, 2026
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github-actions bot commented Mar 30, 2026

PR summary 8f1377de1f

Import changes for modified files

No significant changes to the import graph

Import changes for all files
Files Import difference

Declarations diff

+ gfpApprox_anti_right
+ lfpApprox_mono_right

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).

@mathlib-merge-conflicts mathlib-merge-conflicts bot added the merge-conflict The PR has a merge conflict with master, and needs manual merging. (this label is managed by a bot) label Apr 2, 2026
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This pull request has conflicts, please merge master and resolve them.

@github-actions github-actions bot removed the merge-conflict The PR has a merge conflict with master, and needs manual merging. (this label is managed by a bot) label Apr 3, 2026
@vihdzp vihdzp requested a review from YaelDillies April 4, 2026 17:16
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