We consider the NP-complete problem of finding a spanning k-tree of minimum weight in a complete weighted graph. This problem has a number of applications in designing reliable backbone telecommunication networks. We propose effective algorithms based on a greedy strategy and several variable neighborhood search metaheuristics. We also develop an integer linear programming model for calculating a lower bound. Preliminary numerical experiments using random and real-word data sets are reported to show the effectiveness of our approach. In addition, we compare our approach with known metaheuristics.
Вводится класс n-последователь носвязных графов, рассматриваются области их применения. Приводятся основные характеристики и свойства графов рассматриваемого класса. Определяются отношения класса n-последовательносвязных графов к классам совершенных, триангулированных, полных и расщепляемых графов.
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