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Semi-inducibility of 4-vertex graphs

2 Pith papers cite this work. Polarity classification is still indexing.

2 Pith papers citing it
abstract

For a graph $H$ whose edges are coloured blue or red, the $H$-semi-inducibility problem asks for the maximum, over all graphs $G$ of given order $n$, of the number of injections from the vertex set of $H$ into the vertex set of $G$ that send red (resp. blue) edges of $H$ to edges (resp. non-edges) of $G$. We consider all possible 4-vertex non-complete graphs $H$ and essentially resolve all remaining cases except when $H$ is the 3-edge path coloured blue-blue-red in this order (or is equivalent to this case). Some of our proofs are computer-generated, using the flag algebra method of Razborov.

fields

math.CO 2

years

2026 2

verdicts

UNVERDICTED 2

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representative citing papers

Local maximum of inducibility profiles

math.CO · 2026-05-14 · unverdicted · novelty 7.0

I_{K_{2,2,1}}(e) has at least two local maxima in (0,1) and I_{K_t^-}(e) has a non-global local maximum for t in {5,8,11,...,74}.

Fixed-density profiles for the semi-induced 4-vertex star

math.CO · 2026-06-22 · unverdicted · novelty 6.0

For every fixed β in [0,1], the extremal S_{2,1}-densities are determined: the upper side completes a four-branch profile via prior work plus new low-density proof, while the lower side is achieved by a one-parameter three-class complement-split family rather than quasi-star/quasi-clique.

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Showing 2 of 2 citing papers after filters.

  • Local maximum of inducibility profiles math.CO · 2026-05-14 · unverdicted · none · ref 3 · internal anchor

    I_{K_{2,2,1}}(e) has at least two local maxima in (0,1) and I_{K_t^-}(e) has a non-global local maximum for t in {5,8,11,...,74}.

  • Fixed-density profiles for the semi-induced 4-vertex star math.CO · 2026-06-22 · unverdicted · none · ref 6 · internal anchor

    For every fixed β in [0,1], the extremal S_{2,1}-densities are determined: the upper side completes a four-branch profile via prior work plus new low-density proof, while the lower side is achieved by a one-parameter three-class complement-split family rather than quasi-star/quasi-clique.