On Minimum Average Stretch Spanning Trees in Polygonal 2-Trees

  • N. S. Narayanaswamy
  • G. Ramakrishna
Part of the Lecture Notes in Computer Science book series (LNCS, volume 8344)


A spanning tree of an unweighted graph is a minimum average stretch spanning tree if it minimizes the ratio of sum of the distances in the tree between the end vertices of the graph edges and the number of graph edges. We consider the problem of computing a minimum average stretch spanning tree in polygonal 2-trees, a super class of 2-connected outerplanar graphs. For a polygonal 2-tree on n vertices, we present an algorithm to compute a minimum average stretch spanning tree in O(n logn) time. This also finds a minimum fundamental cycle basis in polygonal 2-trees.


Outerplanar Graph External Edge Fundamental Cycle Unweighted Graph Average Stretch 
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© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • N. S. Narayanaswamy
    • 1
  • G. Ramakrishna
    • 1
  1. 1.Department of Computer Science and EngineeringIndian Institute of Technology MadrasIndia

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