Open Conjecture Board

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Every graph satisfies 2n+(G) ≤ n−(G)(n−(G)+1) (Akbari, Elphick, Kumar, Pragada, Tang, quadratic inertia conjecture).

Status is community- and machine-tracked and may lag. Verify independently before investing effort.

Assessment

Renown 2/5

Companion conjecture from the same 2026 inertia paper.

Attackability 4/5

Finite graph witness, cheap exact oracle, fresh target.

finite witness
5/5
oracle cost
4/5
freshness
4/5
seedability
3/5

Confirmed resolution

counterexample by H. Chen and J. Li on .

Counterexamples to a conjecture on graph inertia; a dense family also refuting a related order inequality from the same paper.

Evidence

Claims

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No active claims.

Confirmed

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