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Proper rainbow saturation for trees

Combinatorics · Submitted 23 Sep 2024

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim We obtain exact and asymptotic results on $\text{sat}^*(n,T)$ for several infinite families of trees.

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arXiv ID2409.15275 (version 2)
Pith IDJB46DJCP, Pith's permanent record of this paper and its review
CitationAndrew Lane, Natasha Morrison. "Proper rainbow saturation for trees." arXiv:2409.15275 (2024). https://pith.science/paper/JB46DJCP
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arXiv listing abstract v2. Results and the main claim are underlined; .

Given a graph $H$, we say that a graph $G$ is properly rainbow $H$-saturated if: (1) There is a proper edge colouring of $G$ containing no rainbow copy of $H$; (2) For every $e \notin E(G)$, every proper edge colouring of $G+e$ contains a rainbow copy of $H$. The proper rainbow saturation number $\text{sat}^*(n,H)$ is the minimum number of edges in a properly rainbow $H$-saturated graph. In this paper we initiate a systematic study of the proper rainbow saturation number for trees. We obtain exact and asymptotic results on $\text{sat}^*(n,T)$ for several infinite families of trees. Our proofs reveal connections to the classical saturation and semi-saturation numbers.

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#sentencerolethe authors' own workstates the main conclusionstrength
s0 Given a graph $H$, we say that a graph $G$ is properly rainbow $H$-saturated if: (1) There is a proper edge colouring of $G$ containing no rainbow copy of $H$; (2) For every $e \notin E(G)$, every proper edge colouring of $G+e$ contains a rainbow copy of $H$. background 1.00 0.06 0.03 asserted 0.88
s1 The proper rainbow saturation number $\text{sat}^*(n,H)$ is the minimum number of edges in a properly rainbow $H$-saturated graph. background 0.99 0.10 0.04 asserted 0.94
s2 In this paper we initiate a systematic study of the proper rainbow saturation number for trees. contribution 0.99 0.83 0.06 asserted 0.98
s3 We obtain exact and asymptotic results on $\text{sat}^*(n,T)$ for several infinite families of trees. result 0.90 0.97 0.72 asserted 1.00
s4 Our proofs reveal connections to the classical saturation and semi-saturation numbers. interpretation 0.95 0.89 0.10 asserted 1.00

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Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

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Original abstract

Given a graph $H$, we say that a graph $G$ is properly rainbow $H$-saturated if: (1) There is a proper edge colouring of $G$ containing no rainbow copy of $H$; (2) For every $e \notin E(G)$, every proper edge colouring of $G+e$ contains a rainbow copy of $H$. The proper rainbow saturation number $\text{sat}^*(n,H)$ is the minimum number of edges in a properly rainbow $H$-saturated graph. In this paper we initiate a systematic study of the proper rainbow saturation number for trees. We obtain exact and asymptotic results on $\text{sat}^*(n,T)$ for several infinite families of trees. Our proofs reveal connections to the classical saturation and semi-saturation numbers.

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Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

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  • Prior to this work, asymptotically tight bounds on $(n,H)$ were only known for $H = C_4$ (Halfpap, Lidický, and Masařík [ref] ), and $H = P_4$ (Bushaw, Johnston, and Rombach [ref] ).

    2403.15602 · Introduction · 0.88

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