MEDIANS OF GRAPHS AND KINGS OF TOURNAMENTS*
نویسندگان
چکیده
منابع مشابه
Medians of Graphs and Kings of Tournaments*
We first prove that for any graph G with a positive vertex weight function w, there exists a graph H with a positive weight function w′ such that w(v) = w′(v) for all vertices v in G and whose w′-median is G. This is a generalization of a previous result for the case in which all weights are 1. The second result is that for any n-tournament T without transmitters, there exists an integer m ≤ 2n...
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Koh and Tan gave a sufficient condition for a 3-partite tournament to have at least one 3-king in [K.M. Koh, B.P. Tan, Kings in multipartite tournaments, Discrete Math. 147 (1995) 171–183, Theorem 2]. In Theorem 1 of this paper, we extend this result to n-partite tournaments, where n 3. In [K.M. Koh, B.P. Tan, Number of 4-kings in bipartite tournaments with no 3-kings, Discrete Math. 154 (1996)...
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15 صفحه اولFixing Tournaments for Kings, Chokers, and More
We study the tournament fixing problem (TFP), which asks whether a tournament organizer can rig a single-elimination (SE) tournament such that their favorite player wins, simply by adjusting the initial seeding. Prior results give two perspectives of TFP: on the one hand, deciding whether an arbitrary player can win any SE tournament is known to be NP-complete; on the other hand, there are a nu...
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A tournament Tn is an orientation of a complete graph on n vertices. A king in a tournament is a vertex from which every other vertex is reachable by a path of length at most 2. A sorted sequence of kings in a tournament Tn is an ordered list of its vertices u1, u2, . . . , un such that ui dominates ui+1 (ui → ui+1) and ui is a king in the subtournament induced by {uj : i ≤ j ≤ n} for each i = ...
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ژورنال
عنوان ژورنال: Taiwanese Journal of Mathematics
سال: 1997
ISSN: 1027-5487
DOI: 10.11650/twjm/1500404928