On the minimum monochromatic or multicolored subgraph partition problems
On the minimum monochromatic or multicolored subgraph partition problems
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关于最小单色或多色子图划分问题
DOI:
10.1016/j.tcs.2007.04.033
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发表时间:
2007-10
影响因子:
1.1
通讯作者:
张晓岩
中科院分区:
文献类型:
--
作者:
李学良;张晓岩
Let G=(V,E) be an edge-colored graph. A subgraph H is said to be monochromatic if all the edges of H have the same color, and multicolored if no two edges of H have the same color. We investigate the complexity of the problems for finding the minimum number of monochromatic or multicolored subgraphs, such as cliques, cycles, trees and paths, partitioning V(G), depending on the number of colors used and the maximal number of times a color appears in a coloring. We also present a greedy scheme that yields a (lnm+1)-approximation for the problem of finding the minimum number of monochromatic cliques partitioning V(G) for a K4−-free graph G, where m is the size of the largest monochromatic clique in G. By a slightly modification of the approximation algorithm, it can be used for the multicolored case. We show that unless NP⊆DTIME(NO(loglogN)), for any ϵ≥0 there is no approximation algorithm for finding the minimum number of multicolored trees partitioning V(G) with performance 50/521(1−ϵ)ln|V|.
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影响因子:
1.8
作者:
Zemin Jin;Xueliang Li
通讯作者:
Zemin Jin;Xueliang Li
DOI:
10.1006/jctb.1996.0065
发表时间:
1996-11
期刊:
J. Comb. Theory, Ser. B
影响因子:
--
作者:
P. Haxell;Y. Kohayakawa
通讯作者:
P. Haxell;Y. Kohayakawa
影响因子:
0.9
作者:
A. Kaneko;M. Kano;Kazuhiro Suzuki
通讯作者:
A. Kaneko;M. Kano;Kazuhiro Suzuki
DOI:
10.1006/jctb.1997.1737
发表时间:
1997-03
期刊:
J. Comb. Theory B
影响因子:
--
作者:
P. Haxell
通讯作者:
P. Haxell
DOI:
10.1016/s0167-5060(08)70377-7
发表时间:
1993
期刊:
Annals of discrete mathematics
影响因子:
--
作者:
P. Erdos;Z. Tuza
通讯作者:
P. Erdos;Z. Tuza