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1 vote
0 answers
63 views

$1$-factorizability for linear hypergraphs with infinite edges on $\omega$

Let $H=(V,E)$ be a hypergraph. We say that $M\subseteq E$ is a matching if the members of $M$ are pairwise disjoint, and $M$ is said to be perfect if $\bigcup M = E$. Moreover, $H$ is $1$-factorizable ...
Dominic van der Zypen's user avatar
3 votes
1 answer
54 views

$1$-factorizability for "complete" finite hypergraphs

Let $H=(V,E)$ be a hypergraph such that $V\neq \varnothing$ and $\varnothing \notin E$. A matching is a subset $M\subseteq E$ such that $m_1\neq m_2 \in M$ implies $m_1\cap m_2 = \varnothing$, and $M$ ...
Dominic van der Zypen's user avatar
5 votes
0 answers
115 views

Hypergraphs with only disjoint perfect matchings

Let $H(n,r)$ be the set of $r$-uniform hypergraph with $n$ vertices that have only disjoint perfect matchings (i.e. every hyperedge only appears in at most one of the perfect matchings). Let $m(h(n,r))...
Mario Krenn's user avatar
6 votes
1 answer
230 views

A non-distinct system of representative edges

I have the following problem: Let $ \mathcal{G} = (G_{i})\_{i} $ be a collection of graphs on the same vertex set. I would like to find a "system of representative edges" $ f : \mathcal{G} \...
julkiewicz's user avatar