Problem packetResearch packetR1258
Current status and unresolved remainder
Link to a section
The record cites sources for its explanation.
Recorded status: reported
Recorded scope: No scope is recorded.
Originating problem: Erdős's variant on almost-bipartite subgraphs of infinite-chromatic graphs
Authored record and scope
- Authored title
- Current status and unresolved remainder
- Record type
- claim
- Stored status
- reported
- Evidence grade
- sourced
2Authored explanation
OPEN as of 2026-07-31. The maintained Erdős Problems database at commit 8138974387d9030542daabe67faaa33eff9356f8 lists Problem 74 as open. The unresolved remainder is the full displayed statement.
A complete resolution must satisfy this condition: Give a rigorous proof or counterexample that completely resolves this statement: Erdős Problem 74: For a simple graph $G$ and a natural number $n$, let the edge distance to bipartite of a subgraph $A$ of $G$ be the minimum number of edges that must be deleted from $A$ to obtain a bipartite graph. Let the maximum subgraph edge distance to bipartite of $G$ at $n$, denoted $b_G(n)$, be the supremum of the edge distances to bipartite over all induced subgraphs of $G$ on exactly $n$ vertices (this supremum is finite because deleting all edges of an $n$-vertex graph, at most $\binom{n}{2}$, always yields a bipartite graph). Does there exist a graph $G$ with infinite chromatic number such that for every natural number $n$, we have $b_G(n) \leq \sqrt{n}$?
Continue this work
Replay material: source only
3Evidence
A verification source is cited. This record has no executable replay attached.
Verification source: www.erdosproblems.com ↗, See dataset.references[0] for the exact external source and locator.
4How it connects
Addressed by
- attempt
Recorded for
- problem
Cite this record
Cite the original sources separately.
Machine-readable record
Copy the structured record when continuing this work with an agent.
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"title": "Current status and unresolved remainder",
"summary": "OPEN as of 2026-07-31. The maintained Erdős Problems database at commit 8138974387d9030542daabe67faaa33eff9356f8 lists Problem 74 as open. The unresolved remainder is the full displayed statement. Give a rigorous proof or counterexample that completely resolves this statement: Erdős Problem 74: For a simple graph $G$ and a natural number $n$, let the edge distance to bipartite of a subgraph $A$ of $G$ be the minimum number of edges that must be deleted from $A$ to obtain a bipartite graph. Let the maximum subgraph edge distance to bipartite of $G$ at $n$, denoted $b_G(n)$, be the supremum of the edge distances to bipartite over all induced subgraphs of $G$ on exactly $n$ vertices (this supremum is finite because deleting all edges of an $n$-vertex graph, at most $\\binom{n}{2}$, always yields a bipartite graph). Does there exist a graph $G$ with infinite chromatic number such that for every natural number $n$, we have $b_G(n) \\leq \\sqrt{n}$?",
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"relevance_source": "recorded",
"body": "OPEN as of 2026-07-31. The maintained Erdős Problems database at commit 8138974387d9030542daabe67faaa33eff9356f8 lists Problem 74 as open. The unresolved remainder is the full displayed statement.\n\nA complete resolution must satisfy this condition: Give a rigorous proof or counterexample that completely resolves this statement: Erdős Problem 74: For a simple graph $G$ and a natural number $n$, let the edge distance to bipartite of a subgraph $A$ of $G$ be the minimum number of edges that must be deleted from $A$ to obtain a bipartite graph. Let the maximum subgraph edge distance to bipartite of $G$ at $n$, denoted $b_G(n)$, be the supremum of the edge distances to bipartite over all induced subgraphs of $G$ on exactly $n$ vertices (this supremum is finite because deleting all edges of an $n$-vertex graph, at most $\\binom{n}{2}$, always yields a bipartite graph). Does there exist a graph $G$ with infinite chromatic number such that for every natural number $n$, we have $b_G(n) \\leq \\sqrt{n}$?",
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}6Provenance
View source, identifiers, and projection details
A statement this project treats as settled at the recorded evidence grade, with the work that backs it.