VERTEX-COVER是NP完全的: 相关知识点: 试题来源: 解析 证明: 这里给出一个从3SAT到VERTEX-COVER 的在多项式时间内运算的规约的细节内容,该规约把布尔公式¢映射为一个图G和值k。对于¢中的每个变量x,产生一条连接着两个结点的边。把这个构件中的两个结点标记为。把x赋值为TRUE对应于顶点覆盖选择该边的左...
The vertex cover problem is a classic NP-complete problem for which the best worst-case approximation ratio is roughly 2. In this paper, we use a collection of simple reductions, each of which guarantees an approximation ratio of 3/2, to find approximate vertex covers for a large collection...
The vertex cover problem is a classic NP-complete problem for which the best worst-case approximation ratio is roughly 2. In this paper, we use a collection of simple reductions, each of which guarantees an approximation ratio of, to find approximate vertex covers for a large collection of te...
摘要: Starting from the vertex cover problem, this paper obtains a more particular NP-complete problem (comparing with the feedback vertex set problem) and its counterpart in finite automata theory关键词: Theoretical or Mathematical/ finite automata set theory/ vertex cover NP-complete feedback ...
and asks whetherGhas a vertex cover of size at mostk.Vertex Coveris one of the six classic NP-complete problems discussed by Garey and Johnson in their famous work on intractability [26, GT1], and has played an important role in the development of parameterized algorithms [18,19,36]. A...
The fault coverage problem for reconfigurable arrays has received as constraint bipartitevertex coverproblem, which is proved as a NP-complete. 对超大规模集成电路芯片 (VLSI)的缺陷修复可归结为受二分图约束的顶点覆盖问题 ,该问题属于NP完全问题 。
2.The fault coverage problem for reconfigurable arrays has received as constraint bipartitevertex coverproblem, which is proved as a NP-complete.对超大规模集成电路芯片 (VLSI)的缺陷修复可归结为受二分图约束的顶点覆盖问题 ,该问题属于NP完全问题 。
Safra On the hardness of approximating minimum vertex cover Ann. of Math., 162 (1) (2005) preliminary version in STOC 2002 Google Scholar [11] U. Feige, S. Goldwasser, L. Lovász, S. Safra, M. Szegedy, Approximating clique is almost NP-complete, in: Proc. 32nd IEEE Symp. on ...
For a graph , a set is a vertex cover if for every edge at least one of the vertices belongs to C. The well-known classical Vertex Cover problem is the problem of deciding whether a graph G has a vertex cover of size at most k. This problem is NP-complete and thus was studied fr...
Finding the minimum vertex cover is an NP-complete problem. However, by using some heuristics we can obtain a vertex cover set, which is in the worst case at most twice that of the optimal. Our algorithm provides solutions specifying coverage sensors that can be used as communication sensors ...