Packing Three-Vertex Paths in a Subcubic Graph

Adrian Kosowski 1 Michal Malafiejski 1 Pawel Zyliński 2
1 Gdansk University of Technology - Department of Algorithms and System Modeling
2 Instytut Matematyki [Gdańsk]
Abstract : In our paper we consider the $P_3$-packing problem in subcubic graphs of different connectivity, improving earlier results of Kelmans and Mubayi. We show that there exists a $P_3$-packing of at least $\lceil 3n/4\rceil$ vertices in any connected subcubic graph of order $n>5$ and minimum vertex degree $\delta \geq 2$, and that this bound is tight. The proof is constructive and implied by a linear-time algorithm. We use this result to show that any $2$-connected cubic graph of order $n>8$ has a $P_3$-packing of at least $\lceil 7n/9 \rceil$ vertices.
Keywords : three-vertex paths subcubic graphs path packing
Type de document :
Communication dans un congrès
Stefan Felsner. 2005 European Conference on Combinatorics, Graph Theory and Applications (EuroComb '05), 2005, Berlin, Germany. Discrete Mathematics and Theoretical Computer Science, DMTCS Proceedings vol. AE, European Conference on Combinatorics, Graph Theory and Applications (EuroComb '05), pp.213-218, 2005, DMTCS Proceedings
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Adrian Kosowski, Michal Malafiejski, Pawel Zyliński. Packing Three-Vertex Paths in a Subcubic Graph. Stefan Felsner. 2005 European Conference on Combinatorics, Graph Theory and Applications (EuroComb '05), 2005, Berlin, Germany. Discrete Mathematics and Theoretical Computer Science, DMTCS Proceedings vol. AE, European Conference on Combinatorics, Graph Theory and Applications (EuroComb '05), pp.213-218, 2005, DMTCS Proceedings. 〈hal-01184370〉

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