feat: prove the Ramsey theorem for infinite graphs#281
Open
ctchou wants to merge 12 commits intoleanprover:mainfrom
Open
feat: prove the Ramsey theorem for infinite graphs#281ctchou wants to merge 12 commits intoleanprover:mainfrom
ctchou wants to merge 12 commits intoleanprover:mainfrom
Conversation
ctchou
force-pushed
the
graph-ramsey
branch
2 times, most recently
from
2a4275d to
7723425
Compare
chenson2018
reviewed
Feb 4, 2026
chenson2018
approved these changes
Feb 4, 2026
Collaborator
|
(that merge made |
Contributor
Author
|
@chenson2018 Thanks for the fix! |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
3 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
This PR proves the Ramsey theorem for infinite graphs, which will be needed in Buchi's proof that omega-regular languages are closed under complementation.
Ideally, this result should be in mathlib, but it is not and I don't know when it will be:
https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Infinite.20Ramsey.20theory/with/568507228
So I now prove what I will need. Once mathlib has the desired result, this proof can be deprecated.