Skip to content

feat: split continuous linear maps#26174

Closed
grunweg wants to merge 16 commits intoleanprover-community:masterfrom
grunweg:MR-continuouslinearmap-split-fork
Closed

feat: split continuous linear maps#26174
grunweg wants to merge 16 commits intoleanprover-community:masterfrom
grunweg:MR-continuouslinearmap-split-fork

Conversation

@grunweg
Copy link
Copy Markdown
Contributor

@grunweg grunweg commented Jun 19, 2025

We define split linear maps and prove their basic properties.

Manually migrated from #23186.


There are two sorries left. One is ClosedComplemented.prod; the other relates to the composition of split maps. Help with both is welcome.

This zulip discussion contains a proof of the non-trivial sorry.

Open in Gitpod

@github-actions github-actions bot added the t-analysis Analysis (normed *, calculus) label Jun 19, 2025
@github-actions
Copy link
Copy Markdown

github-actions bot commented Jun 19, 2025

PR summary 24d904ee7b

Import changes for modified files

No significant changes to the import graph

Import changes for all files
Files Import difference
Mathlib.Analysis.NormedSpace.HahnBanach.Splits (new file) 2117

Declarations diff

+ ContinuousLinearMap.Splits
+ Submodule.ClosedComplemented.prod
+ Submodule.map_add
+ Submodule.sum_assoc
+ _root_.ContinuousLinearEquiv.splits
+ antilipschitzConstant
+ antilipschitzWith
+ antilipschitz_aux
+ closedComplemented
+ comp
+ compCLE_left
+ compCLE_right
+ complement
+ complement_isClosed
+ complement_isCompl
+ congr
+ disjoint_aux
+ injective
+ isClosedMap
+ isClosed_range
+ of_injective_of_finiteDimensional
+ of_injective_of_finiteDimensional_of_completeSpace
+ prodMap

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.


Increase in tech debt: (relative, absolute) = (1.00, 0.00)
Current number Change Type
631 1 erw

Current commit 78dc2d53f2
Reference commit 24d904ee7b

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).

@grunweg grunweg added help-wanted The author needs attention to resolve issues WIP Work in progress labels Jun 19, 2025
@mathlib4-merge-conflict-bot mathlib4-merge-conflict-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 Nov 6, 2025
@mathlib4-merge-conflict-bot
Copy link
Copy Markdown
Collaborator

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 Jan 30, 2026
grunweg added a commit to grunweg/mathlib4 that referenced this pull request Jan 30, 2026
Two sorries remaining, which are out of scope for this branch
@grunweg grunweg force-pushed the MR-continuouslinearmap-split-fork branch from 9f02a96 to de122d7 Compare January 30, 2026 21:44
@grunweg grunweg force-pushed the MR-continuouslinearmap-split-fork branch from de122d7 to 78dc2d5 Compare January 30, 2026 21:45
@grunweg
Copy link
Copy Markdown
Contributor Author

grunweg commented Mar 18, 2026

Superseded by #35057; this PR can be closed now!

@grunweg grunweg closed this Mar 18, 2026
@grunweg grunweg deleted the MR-continuouslinearmap-split-fork branch March 18, 2026 16:31
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Labels

help-wanted The author needs attention to resolve issues t-analysis Analysis (normed *, calculus) WIP Work in progress

Projects

None yet

Development

Successfully merging this pull request may close these issues.

2 participants