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A note on the domination number in bipartite graphs | ||
| Communications in Combinatorics and Optimization | ||
| مقاله 13، دوره 11، شماره 4، اسفند 2026، صفحه 1215-1219 اصل مقاله (308.44 K) | ||
| نوع مقاله: Original paper | ||
| شناسه دیجیتال (DOI): 10.22049/cco.2026.31447.2855 | ||
| نویسنده | ||
| Nader Jafari Rad* | ||
| Department of Mathematics, Shahed University, Tehran, Iran | ||
| چکیده | ||
| Archdeacon et al. [J. Graph Theory 46 (2004), 207--210] proved that if $G$ is a bipartite graph with partite sets $X$ and $Y$ whose vertices in $Y$ are of minimum degree at least $3$ then there exists a set $A\subseteq X$ of size at most $\frac{|X\cup Y|}{4}$ such that every vertex in $Y$ is adjacent to a vertex in $A$. We generalize this result for all bipartite graphs with minimum degree $\delta\geq 3$ using the Brooks Theorem on the vertex coloring. | ||
| کلیدواژهها | ||
| domination number؛ bipartite graph | ||
| مراجع | ||
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[1] D. Archdeacon, J. Ellis-Monaghan, D. Fischer, D. Froncek, P.C.B. Lam, S. Seager, B. Wei, and R. Yuster, Some remarks on domination, J. Graph Theory 46 (2004), no. 3, 207–210. https://doi.org/10.1002/jgt.20000
[2] R.L. Brooks, On colouring the nodes of a network, Math. Proc. Cambridge Philos. Soc. 37 (1941), no. 2, 194–197.
[3] T. Gerlach and J. Harant, A note on domination in bipartite graphs, Discuss. Math. Graph Theory 22 (2002), no. 2, 229–231. https://doi.org/10.7151/dmgt.1171
[4] J. Harant and A. Pruchnewski, A note on the domination number of a bipartite graph, Ann. Comb. 5 (2001), no. 2, 175–178.
[5] J. Harant and D. Rautenbach, Domination in bipartite graphs, Discrete Math. 309 (2009), no. 1, 113–122. https://doi.org/10.1016/j.disc.2007.12.051
[6] T.W. Haynes, S.T. Hedetniemi, and M.A. Henning, Topics in domination in graphs, 2020.
[7] T.W. Haynes, S.T. Hedetniemi, and P.J. Slater, Fundamentals of domination in graphs, 1998. | ||
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