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Source labels openChecked July 26, 2026

Written on the Wall IICombinatorics

Written on the Wall II - Conjecture 145

Mathematical statement

WOWII Conjecture 145

For a simple connected graph GG, tree(G)2ecc(B)/λmin(G)\mathrm{tree}(G) \ge 2 \cdot \mathrm{ecc}(B) / \lambda_{\min}(\overline{G}) where tree(G)\mathrm{tree}(G) is the number of vertices in a largest induced subtree, ecc(B)\mathrm{ecc}(B) is the eccentricity of the boundary vertices (eccSet and boundaryVertices), and λmin(G)\lambda_{\min}(\overline{G}) is the minimum local independence number of the complement graph.

We state the inequality in the form tree(G)lMin(G)2ecc(B)\mathrm{tree}(G) \cdot \mathrm{lMin}(\overline{G}) \ge 2 \cdot \mathrm{ecc}(B) to avoid division.

Statement source: Written on the Wall II statement material

Statement terms: Source-specific

Source-specific terms. Therefore does not assert reuse rights beyond attributed display.

Statement artifacts, not proofs

These records expose exact Lean propositions and statement-only wrappers. Defining a proposition does not supply a proof of it. A placeholder-bearing target also contains no proof. Elaboration checks syntax and types; it does not certify that a formalization perfectly captures every nuance of the informal problem.

Pinned Lean formulation 1

conjecture145

Canonical source
Complete statement target, proof intentionally absentLean 4
theorem conjecture145 (G : SimpleGraph α) [DecidableRel G.Adj] (h : G.Connected)    (hlMin : 0 < localIndependenceMin Gᶜ) :    2 * eccSet G (maxEccentricityVertices G : Set α)     largestInducedTreeSize G * localIndependenceMin Gᶜ := by  sorry
Statement source
Formal Conjectures
Lean version
v4.27.0
Placeholder
Present; no proof artifact
Source evidence
Pinned source index
Fidelity review
Community formulation

References