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Fine analysis of the quasi-orderings on the power set.Order, 18(4):339–347, 2001

Alberto Marcone · 2001 · DOI 10.1023/a:1013952225669

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Obstructions for Minor-Closed Classes of limiting Densities Below 3/2

math.CO · 2026-06-23 · unverdicted · novelty 8.0

For every δ < 3/2 the ⊆-minimal minor-closed classes with density >δ form a finite explicitly identified set, yielding a 2^poly(n)-time algorithm that computes δ(excl(Z)) or reports ≥3/2 for any finite forbidden-minor set Z.

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  • Obstructions for Minor-Closed Classes of limiting Densities Below 3/2 math.CO · 2026-06-23 · unverdicted · none · ref 18

    For every δ < 3/2 the ⊆-minimal minor-closed classes with density >δ form a finite explicitly identified set, yielding a 2^poly(n)-time algorithm that computes δ(excl(Z)) or reports ≥3/2 for any finite forbidden-minor set Z.