The subdivision-constrained minimum spanning tree problem
The subdivision-constrained minimum spanning tree problem
复制标题
细分约束的最小生成树问题
DOI:
10.1016/j.tcs.2008.12.038
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发表时间:
2009-03
影响因子:
1.1
通讯作者:
Li, Jianping
中科院分区:
文献类型:
--
作者:
Li, Weidong;Zhang, Tongquan;Zhang, Zhongxu;Li, Jianping
Motivated by the constrained minimum spanning tree (CST) problem in Hassin and Levin [R. Hassin, A. Levin, An efficient polynomial time approximation scheme for the constrained minimum spanning tree problem using matroid intersection, SIAM Journal on Computing 33 (2) (2004) 261–268], we study a new combinatorial optimization problem in this paper, called the general subdivision-constrained spanning tree problem (GSCST): given a graph G=(V,E;w,c) with two nonnegative integers w(e) and c(e) for each edge e∈E, two positive integers B and d, the GSCST problem is to first find a spanning tree T=(V,ET) of G with weight [Formula: see text] and then to insert some new vertices on some suitable edges in T such that each edge in the subdivision tree T′of T has its weight not beyond d. The objective is to minimize the cost [Formula: see text] of such new vertices inserted on the suitable edges among all spanning trees of G subject to the two preceding constraints, where a subdivision tree T′of T is constructed by inserting some new vertices on the suitable edges in T, the value insert(e)=⌈w(e)d⌉−1 is the least number of vertices inserted and c(e) is the cost of each vertex inserted on the edge e. We obtain the following main results: (1) the GSCST problem and its variant are still NP-hard, by a reduction from the 0–1 knapsack problem, respectively; (2) the GSCST problem as well as its variant is polynomially equivalent to the CST problem, which implies the existence of a polynomial time approximation scheme to solve the GSCST problem and its variant; (3) we finally design three strongly polynomial time algorithms to solve the special versions of the GSCST problem and its variant, respectively.
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影响因子:
3.7
作者:
C. Berge;A. Ghouila-Houri;M. Merrington;C. Ramanujacharyulu
通讯作者:
C. Berge;A. Ghouila-Houri;M. Merrington;C. Ramanujacharyulu
DOI:
10.1093/comjnl/9.2.166
发表时间:
1966-08
期刊:
The Computer Journal
影响因子:
--
作者:
K. Haley
通讯作者:
K. Haley
DOI:
10.1016/j.orl.2003.06.003
发表时间:
2004-05
期刊:
Oper. Res. Lett.
影响因子:
--
作者:
Sung-Pil Hong;Sung-Jin Chung;B. Park
通讯作者:
Sung-Pil Hong;Sung-Jin Chung;B. Park
DOI:
10.1137/s0097539703426775
发表时间:
2004-02
期刊:
SIAM J. Comput.
影响因子:
--
作者:
Refael Hassin;Asaf Levin
通讯作者:
Refael Hassin;Asaf Levin
DOI:
10.1057/jors.1977.45
发表时间:
1978-03
期刊:
--
影响因子:
--
作者:
E. Lloyd;J. Bondy;U. Murty
通讯作者:
E. Lloyd;J. Bondy;U. Murty