| 单词 | tournament graph | 
| 释义 | > as lemmastournament graph  4.  Mathematics. A set of points each of which is joined to every other point by a line having a direction. Also  tournament graph. ΘΚΠ the world > relative properties > number > graph or diagram > 			[noun]		 > graph > showing specific relationship characteristic1881 characteristic curve1881 time curve1883 luminosity curve1886 hysteresis curve1890 hysteresis loop1892 time-distance1892 solidus1901 power curve1908 log log1910 Russell diagram1922 creep curve1931 power curve1932 Hertzsprung–Russell diagram1939 Petersen graph1947 utility curve1948 tournament graph1959 offset1987 1959    F. Harary in  Management Sci. V. 398  				Consider a tournament in which there are n players, every pair of players play each other once, and none of the games ends in a draw. For brevity let us call the resulting digraph D itself a tournament. 1972    R. J. Wilson Introd. Graph Theory vii. 108  				Let T be a tournament on n + 1 vertices, and let T′ be the tournament on n vertices obtained by removing from T a vertex v and every arc incident to v. 1980    Sci. Amer. Mar. 18/3  				Tournament graphs provide a convenient means of modeling a person's pairwise preferences for any set of choices, such as brands of coffee or candidates in an election. < as lemmas | 
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