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feat: supremum of countably many countable ordinals is countable#37025

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vihdzp wants to merge 45 commits intoleanprover-community:masterfrom
vihdzp:cof_countable
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feat: supremum of countably many countable ordinals is countable#37025
vihdzp wants to merge 45 commits intoleanprover-community:masterfrom
vihdzp:cof_countable

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@vihdzp vihdzp commented Mar 23, 2026

@github-actions github-actions bot added the t-set-theory Set theory label Mar 23, 2026
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github-actions bot commented Mar 23, 2026

PR summary 5ccfc60402

Import changes for modified files

No significant changes to the import graph

Import changes for all files
Files Import difference

Declarations diff

+ _root_.Ordinal.iSup_lt_omega_one

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-dependent-issues mathlib-dependent-issues bot added the blocked-by-other-PR This PR depends on another PR (this label is automatically managed by a bot) label Mar 23, 2026
@github-actions github-actions 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 Mar 23, 2026
@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 Mar 23, 2026
@mathlib-dependent-issues mathlib-dependent-issues bot removed the blocked-by-other-PR This PR depends on another PR (this label is automatically managed by a bot) label Mar 31, 2026
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