Source · Project

Cycle double cover in Lean

Project documentationPublication date Jul 9, 2026
View project ↗

Reading source record 577e9d9ea326d520f80672ee69b830bf1d513df5. View default cited record →

Overview

The source endpoint covers finite loopless bridgeless multigraphs via a formalized eight-flow theorem and a conversion to cycle covers.

Public formal source; build and independent mathematical review are separate checks.

Passages

The exact passages cited in OpenMath. Each passage identifies how its wording was recorded.

Passage 1 · OpenMath paraphrasePermalink

CDCLean/Main.lean; README verification and exact endpoint

The source endpoint covers finite loopless bridgeless multigraphs via a formalized eight-flow theorem and a conversion to cycle covers.

Passage details

Passage ID: cycle-double-cover:entry:lean:v1

Source item: lean

Source record: cycle-double-cover:source:lean:v1

Used in

Explicit citations in versioned problem publications. A citation records a use; it does not confer proof or independent verification.

Cycle double cover conjecture →

Problem publication v5

Every bridgeless graph has a cycle double cover →

Source assessment

Proposed

Unconditional Lean endpoint reported complete

CDCLean.cycleDoubleCover_of_bridgeless, with no additional project axioms reported.

Observed Oct 13, 2026

Problem context · 4 citations

Research activity

Compare the statement and proof evidence

The public theorem and manuscript can be examined alongside Kintali’s separately authored proposal.

Independent mathematical review and a locally reproduced formal build remain pending.

Further reading

Inspect the formal statement, assumptions and reported checks.

Files

Linked manuscripts, code and data. External proof reports, statement correspondence and OpenMath execution are separate checks.

Formal code

Cycle double cover in Lean — pinned source ↗

No OpenMath execution recorded

Public source inspected for statement and assumptions; this proof project has not been executed by OpenMath.

Resource revision: 577e9d9ea326d520f80672ee69b830bf1d513df5

Formal declarations

Lean: the full bridgeless multigraph statement ↗

Complete formal proof reported externally

The project reports an unconditional proof endpoint using only standard logical axioms. It is linked as source evidence while mathematical assessment of the new proof remains pending.

Statement match: Linked by OpenMath · independent review separate · checked Oct 13, 2026

Declaration & revision

Credits

Recorded authorship

OpenAI · openai/cdc-lean project

OpenAI, openai/cdc-lean project

AI involvement reported by the source

This formal source accompanies the OpenAI AI-assisted proof report; formal checking and human exposition are separate evidence roles.

Versions

OpenMath source records preserve exact citations. Observation dates order these records; they do not establish the latest upstream paper or proof.

  1. 577e9d9ea326d520f80672ee69b830bf1d513df5 · selectedObserved Oct 13, 2026 · used in current publications

    Cycle double cover in Lean

Record details
Source ID
cycle-double-cover-lean
Record ID
cycle-double-cover:source:lean:v1
Recorded title
Cycle double cover in Lean
Revision
577e9d9ea326d520f80672ee69b830bf1d513df5
Observed
Oct 13, 2026
Source updated
Jul 9, 2026
Content SHA-256
ffe1a481bcfa67c49b25830a67cb338a6c7fdda3eb29e4dcffcd63e795f0c963
Update method
Source comparison followed by a new immutable curation revision.
Identifier policy
Stable source and entry identities; changed wording receives a new version.
Check interval
90 days
Rights
metadata-link
License
Original document rights remain with its authors.

OpenMath supplies original paraphrases and links; no proof text is republished.

Source terms ↗