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feat(Topology/Category): TopCat.uliftFunctor preserves all limits and colimits#34993

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chrisflav:ulift-topcat-limits
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feat(Topology/Category): TopCat.uliftFunctor preserves all limits and colimits#34993
chrisflav wants to merge 1 commit intoleanprover-community:masterfrom
chrisflav:ulift-topcat-limits

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@chrisflav chrisflav added the t-category-theory Category theory label Feb 8, 2026
@github-actions github-actions bot added the large-import Automatically added label for PRs with a significant increase in transitive imports label Feb 8, 2026
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github-actions bot commented Feb 8, 2026

PR summary 8115783e28

Import changes exceeding 2%

% File
+5.04% Mathlib.Topology.Category.TopCat.ULift

Import changes for modified files

Dependency changes

File Base Count Head Count Change
Mathlib.Topology.Category.TopCat.ULift 734 771 +37 (+5.04%)
Import changes for all files
Files Import difference
Mathlib.AlgebraicTopology.TopologicalSimplex 2
Mathlib.Topology.Category.TopCat.ULift 37

Declarations diff

+ instance : PreservesColimitsOfSize.{w', w} uliftFunctor.{v, u} := by
+ instance : PreservesLimitsOfSize.{w', w} uliftFunctor.{v, u} := by
+ nonempty_isColimit_iff_eq_coinduced
+ nonempty_isLimit_iff_eq_induced

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).

@github-actions github-actions bot added the t-topology Topological spaces, uniform spaces, metric spaces, filters label Feb 8, 2026
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large-import Automatically added label for PRs with a significant increase in transitive imports t-category-theory Category theory t-topology Topological spaces, uniform spaces, metric spaces, filters

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