# Rajendra P. Lal

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A spanning tree T of a graph G is called a tree t-spanner if the distance between any two vertices in T is at most t-times their distance in G. A graph that has a tree t- spanner is called a tree t-spanner admissible graph. Given a graph G and an integer t, the tree t-spanner problem asks whether G admits a tree t-spanner. It is known that the tree… (More)

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