Let (possibly very slowly). Is there a graph of infinite chromatic number such that every finite subgraph on vertices can be made bipartite by deleting at most edges?

claimed — no verifier run, no signed judgmentunreviewedOpen. Worked here; no verified result yet.

graph theory · open · prize $500 · formalized (Lean) · 0 attempts

machinery: graph-coloring,LP-layered-deletion,extremal-set-system

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Evidence

unverified AI candidates (2)

gpt-erdos · GPT-5.2 Pro + Deep Research · unverified

This is a well-known Erdős–Hajnal–Szemerédi problem, and in full generality it is **still open**. In particular, nobody knows whether you can do this for an *arbitrary* function (f(n)\to\infty) that grows very slowly. ([Erdős Problems][1])

candidate solution ↗

llm-hunter · gpt 5.2, gpt pro 5.2 · unverified

2 LLM attack(s) recorded (gpt 5.2, gpt pro 5.2); unverified.

candidate solution ↗

Formal proof

AMS 5 · test (literature)

theorem SimpleGraph.edgeDistancesToBipartite_nonempty {G : SimpleGraph V} (A : G.Subgraph) :
    SimpleGraph.edgeDistancesToBipartite A |>.Nonempty
formal-conjectures/74.lean ↗

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