Open
Unresolved assertion in the cited scope ↗
Stephen Cook · The P versus NP problem · Proof complexity discussion, pp. 5–6 →
Observed Oct 10, 2026
Conjecture · version 2
NP ≠ coNP
Statement
NP and coNP are distinct.
Assumptions
- Classical NP and complements of NP languages.
Scope
A stronger related separation; not equivalent to P ≠ NP.
Evidence
Source reports
Connections
In this problem · publication v12 · Selected context
P versus NP →
Different statement · related variant · Open
This statement contributes context in its stated scope; it does not settle the canonical P versus NP question.
One-way implication
implies ↓P ≠ NP
Separating NP from coNP would also separate P from NP.
The converse is not established; short proofs in one particular proof system are a narrower question.
Details & sources
NP ≠ coNP →
Open · version 2
NP and coNP are distinct.
- Classical NP and complements of NP languages.
Scope: A stronger related separation; not equivalent to P ≠ NP.
P ≠ NP →
Open · version 3
There exists a language in NP that is not decidable by any deterministic polynomial-time algorithm.
- Finite binary inputs; uniform classical computation; polynomial time in bit length.
Scope: The conjectural negative answer to the same canonical question.
NP versus coNP would separate P and NP →
Relationship statement · Proved · version 2
If NP ≠ coNP, then P ≠ NP.
- P is closed under complementation.
Scope: The implication does not establish its premise.
Relationship not independently reviewed.
Connection in P versus NP →Relationship not independently reviewed. This concerns its use in this problem.
In this problem · publication v14
P versus NP →
Different statement · related variant · Open
This statement contributes context in its stated scope; it does not settle the canonical P versus NP question.
One-way implication
implies ↓P ≠ NP
Separating NP from coNP would also separate P from NP.
The converse is not established; short proofs in one particular proof system are a narrower question.
Details & sources
NP ≠ coNP →
Open · version 2
NP and coNP are distinct.
- Classical NP and complements of NP languages.
Scope: A stronger related separation; not equivalent to P ≠ NP.
P ≠ NP →
Open · version 3
There exists a language in NP that is not decidable by any deterministic polynomial-time algorithm.
- Finite binary inputs; uniform classical computation; polynomial time in bit length.
Scope: The conjectural negative answer to the same canonical question.
NP versus coNP would separate P and NP →
Relationship statement · Proved · version 2
If NP ≠ coNP, then P ≠ NP.
- P is closed under complementation.
Scope: The implication does not establish its premise.
Relationship not independently reviewed.
Connection in P versus NP →Relationship not independently reviewed. This concerns its use in this problem.
Sources
Stephen Cook · The P versus NP problem →
- Proof complexity discussion, pp. 5–6 → · Original passage ↗
Recorded wording
NP and coNP are distinct.
paraphrase · Only metadata and original OpenMath paraphrases are published; proof PDFs remain at their source.
- Problem statement and discussion, pp. 2–3 → · Original passage ↗
Recorded wording
There exists a language in NP that is not decidable by any deterministic polynomial-time algorithm.
paraphrase · Only metadata and original OpenMath paraphrases are published; proof PDFs remain at their source.
Stephen Cook · Published
Published author exposition or original paper.
Stephen Cook · The P versus NP problem — proof text ↗Manuscript / exposition · external
Revision & attribution
Source revision: official-description-sha256-018f3d473d16. Observed Oct 10, 2026.
AI involvement is not reported by this cited source; this is not a claim of its absence.
Stephen Cook · The P versus NP problem — proof text: official-description-sha256-018f3d473d16. External source text. Its mathematical claims and independent OpenMath review are assessed separately.
Avi Wigderson · Mathematics and Computation →
- §3.5, NP versus coNP → · Original passage ↗
Recorded wording
If NP ≠ coNP, then P ≠ NP.
paraphrase · Only metadata and original OpenMath paraphrases are published; proof PDFs remain at their source.
Avi Wigderson · Published · Publication date 2019
Published author exposition or original paper.
Revision & attribution
Source revision: author-draft-2019-08-06. Observed Oct 10, 2026.
AI involvement is not reported by this cited source; this is not a claim of its absence.
History
Statement versions
Statement versions and problem publication versions are separate. A new publication can update context or sources while retaining the same statement.
Assessment history · 1
Assessments retained in these publication records. Earlier statement versions retain their own source histories.
Open
Unresolved assertion in the cited scope ↗
Observed Oct 10, 2026 · Source passage →
Record details
- Claim ID
- claim-pnp-np-conp
- Statement version
- 2
- SHA-256
- 9bf8f01b67b55cbf7d4381c5341b8e4799240ba8dd38dd2195900e3e10888e2e