Relationship of two formulations for shortest bibranchings
Relationship of two formulations for shortest bibranchings
复制标题
最短双支化的两种公式的关系
DOI:
10.1007/s13160-020-00432-0
复制
发表时间:
2020
影响因子:
0.9
通讯作者:
K. Takazawa
中科院分区:
文献类型:
--
作者:
K. Murota;K. Takazawa
The shortest bibranching problem is a common generalization of the minimum-weight edge cover problem in bipartite graphs and the minimum-weight arborescence problem in directed graphs. For the shortest bibranching problem, an efficient primal-dual algorithm is given by Keijsper and Pendavingh (J Comb Theory Ser B 73:130–145, 1998), and the tractability of the problem is ascribed to total dual integrality in a linear programming formulation by Schrijver (Ann Discret Math 16:261–280, 1982). Another view on the tractability of this problem is afforded by a valuated matroid intersection formulation by Takazawa (Jpn J Ind Appl Math 29:561–573, 2012). In the present paper, we discuss the relationship between these two formulations for the shortest bibranching problem. We first demonstrate that the valuated matroid intersection formulation can be derived from the linear programming formulation through the Benders decomposition, where integrality is preserved in the decomposition process and the resulting convex programming is endowed with discrete convexity. We then show how a pair of primal and dual optimal solutions of one formulation is constructed from that of the other formulation, thereby providing a connection between polyhedral combinatorics and discrete convex analysis.
登录
查看更多内容
影响因子:
1.1
作者:
A. Schrijver
通讯作者:
A. Schrijver
影响因子:
1.1
作者:
M. Babenko
通讯作者:
M. Babenko
影响因子:
0.8
作者:
Murota, K
通讯作者:
Murota, K
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
奥野緑;梅田貴士;前原俊信;Henmi Masayuki;K. Takazawa
通讯作者:
K. Takazawa
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
通讯作者:
--