Mathematical Sciences: Faculty Publications

On Large Semi-Linked Graphs

Document Type

Article

Publication Date

1-2015

Publication Title

Discrete Mathematics

DOI

10.1016/j.disc.2014.08.022

ISSN

0012-365X

Abstract

Let H be a multigraph, possibly with loops, and consider a set S⊆V(H). A (simple) graph G is (H,S)-semi-linked if, for every injective map f:S→V(G), there exists an injective map g:V(H)∖S→V(G)∖f(S) and a set of |E(H)| internally disjoint paths inG connecting pairs of vertices of f(S)∪g(V(H)∖S) for every edge between the corresponding vertices of H. This new concept of (H,S)-semi-linkedness is a generalization of H-linkedness . We establish a sharp minimum degree condition for a sufficiently large graph G to be (H,S)-semi-linked.

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