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arxiv: 1712.04228 · v1 · pith:Y5GZEXSAnew · submitted 2017-12-12 · 🧮 math.CO · cs.DM

On some Graphs with a Unique Perfect Matching

classification 🧮 math.CO cs.DM
keywords matchinggraphperfectuniqueclaw-freegraphscharacterizationcograph
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We show that deciding whether a given graph $G$ of size $m$ has a unique perfect matching as well as finding that matching, if it exists, can be done in time $O(m)$ if $G$ is either a cograph, or a split graph, or an interval graph, or claw-free. Furthermore, we provide a constructive characterization of the claw-free graphs with a unique perfect matching.

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