A set S of vertices of a graph G is a total dominating set if every vertex of V(G) is adjacent to some vertex in S. We provide three equivalent conditions for a tree to have a unique minimum total dominating set and give a constructive characterization of such trees.
@article{bwmeta1.element.bwnjournal-article-doi-10_7151_dmgt_1172, author = {Teresa W. Haynes and Michael A. Henning}, title = {Trees with unique minimum total dominating sets}, journal = {Discussiones Mathematicae Graph Theory}, volume = {22}, year = {2002}, pages = {233-246}, zbl = {1031.05095}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_7151_dmgt_1172} }
Teresa W. Haynes; Michael A. Henning. Trees with unique minimum total dominating sets. Discussiones Mathematicae Graph Theory, Tome 22 (2002) pp. 233-246. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_7151_dmgt_1172/
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