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A robust version of the multipartite Hajnal--Szemer\'edi theorem

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arxiv 2311.00950 v1 pith:WQN3QU7Q submitted 2023-11-02 math.CO

classification math.CO
keywords gammahajnal--szemermultipartitetheoremversionbalancedchooseclass
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abstract

In this note we show the following strengthening of a multipartite version of the Hajnal--Szemer\'edi theorem. For an integer $r \ge 3$ and $\gamma > 0$, there exists a constant $C$ such that if $p\ge Cn^{-2/r}(\log n)^{1/{r \choose 2}}$ and $G$ is a balanced $r$-partite graph with each vertex class of size $n$ and $\delta^\ast(G)\ge (1-1/r+\gamma)n$, then with high probability the random subgraph $G(p)$ of $G$ contains a $K_r$-factor. We also use it to derive corresponding transversal versions.

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Cited by 2 Pith papers

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  1. Transversal packings in families of percolated hypergraphs

    math.CO 2025-07 accept novelty 6.0 of 10

    For any strictly 1-balanced k-graph F, k-graph systems above the transversal Dirac threshold with high probability contain a transversal F-factor after independent random sparsification at p = Ω(n^{-1/d1(F)-1} (log n)^{1/t}).

  2. Transversal Structures in Graph Systems: A Survey

    math.CO 2024-12 unverdicted novelty 2.0 of 10

    Survey compiling sufficient conditions for transversal m-edge structures in graph systems that extend classical extremal graph theory results, plus conjectures.

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