, Volume 64, Issue 1-3, pp 231-246

The Steiner tree problem II: Properties and classes of facets

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Abstract

This is the second part of two papers addressing the study of the facial structure of the Steiner tree polyhedron. In this paper we identify several classes of facet defining inequalities and relate them to special classes of graphs on which the Steiner tree problem is known to be NP-hard.

Corresponding author.
The author appreciates partial support from National Science Foundation Grants Nos. DSM-8606188 and ECS 8800281.