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首页> 外文期刊>Discrete Applied Mathematics >On (d, 2)-dominating numbers of binary undirected de Bruijn graphs
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On (d, 2)-dominating numbers of binary undirected de Bruijn graphs

机译:二元无向de Bruijn图的(d,2)占优数

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In this paper, we show that: (i) For n-dimensional undirected binary de Bruijn graphs, UB(n), n greater than or equal to 4, there is a vertex x = x(i)(x) over bar(1)(x) over bar(1)...(x) over bar x(1) (x(1) = 1 or 0) such that for any other vertex t there exist at least two internally disjoint paths of length at most n - 1 between x and t in UB(n), i.e., the (n - 1,2)-dominating number of UB(n) is equal to one. (ii) For n greater than or equal to 5, let S = {100 01...10}. For any other vertex t there exist at least two internally disjoint paths of length at most n - 2 between t and S in UB(n), i.e., the (n - 2,2)-dominating number of UB(n) is no more than 2. (C) 2000 Elsevier Science B.V. All rights reserved. [References: 10]
机译:在本文中,我们表明:(i)对于n维无向二元de Bruijn图UB(n),n大于或等于4,在bar(上)有一个顶点x = x(i)(x) 1)(x)在bar(1)上...(x)在bar x(1)(x(1)= 1或0)上,使得对于任何其他顶点t至少存在两条内部不相交的长度为UB(n)中x和t之间的大多数n-1,即UB(n)的(n-1,2)占多数。 (ii)对于大于或等于5的n,令S = {100 01 ... 10}。对于任何其他顶点t,在UB(n)中的t和S之间至少存在两个长度不超过n-2的内部不相交路径,即UB(n)的(n-2,2)占多数。大于2。(C)2000 Elsevier Science BV保留所有权利。 [参考:10]

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