Matchings in multipartite hypergraphs
Year: 2025
Type: article
Abstract: A folklore result on matchings in graphs states that if \(G\) is a bipartite graph whose vertex classes \(A\) and \(B\) each have size \(n\), with \(\deg(u) \geq a\) for every \(u \in A\) and \(\deg(v) \geq b\) for every \(v \in B\), then \(G\) admits a matching of size \(\min\{n, a+b\}\). In this paper we establish the analogous result for large \(k\)-partite \(k\)-uniform hypergraphs, answering a question of Han, Zang and Zhao, who previously demonstrated that this result holds under the additional condition that the minimum degrees into at least two of the vertex classes are large. A key part of our proof is a study of rainbow matchings under a combination of degree and multiplicity conditions, which may be of independent interest.Mathematics Subject Classifications: 05C65, 05C70Keywords: Matchings, Hypergraphs
Source: Combinatorial Theory
DOI: 10.5070/c65165019
Authors: Candida Bowtell, Richard Mycroft
Language: English
Subfield: Discrete Mathematics and Combinatorics
Field: Mathematics
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4408444863