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@urkud urkud commented Dec 31, 2025

Some important maps (e.g., Complex.exp or x ↦ x ^ n)
aren't covering maps over the whole space.


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Some important maps (e.g., `Complex.exp` or `x ↦ x ^ n`)
aren't covering maps over the whole space.
@github-actions github-actions bot added the t-topology Topological spaces, uniform spaces, metric spaces, filters label Dec 31, 2025
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PR summary 473b57441b

Import changes for modified files

No significant changes to the import graph

Import changes for all files
Files Import difference

Declarations diff

+ IsCoveringMapOn.existsUnique_continuousMap_lifts

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).

@ocfnash
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ocfnash commented Jan 2, 2026

Thanks!

bors merge

@leanprover-community-mathlib4-bot leanprover-community-mathlib4-bot added the ready-to-merge This PR has been sent to bors. label Jan 2, 2026
mathlib-bors bot pushed a commit that referenced this pull request Jan 2, 2026
Some important maps (e.g., `Complex.exp` or `x ↦ x ^ n`)
aren't covering maps over the whole space.
@mathlib-bors
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mathlib-bors bot commented Jan 2, 2026

Pull request successfully merged into master.

Build succeeded!

And happy new year! 🎉

@mathlib-bors mathlib-bors bot changed the title feat(Homotopy/Lifting): add a lemma about IsCoveringMapOn [Merged by Bors] - feat(Homotopy/Lifting): add a lemma about IsCoveringMapOn Jan 2, 2026
@mathlib-bors mathlib-bors bot closed this Jan 2, 2026
@urkud urkud deleted the covering-on-lifts branch January 4, 2026 03:19
kim-em pushed a commit to kim-em/mathlib4 that referenced this pull request Jan 6, 2026
…er-community#33422)

Some important maps (e.g., `Complex.exp` or `x ↦ x ^ n`)
aren't covering maps over the whole space.
@adomani adomani mentioned this pull request Jan 16, 2026
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3 participants