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Tree spanner

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This is an old revision of this page, as edited by Clpo13 (talk | contribs) at 20:06, 25 May 2006. The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

A tree -spanner of a graph is a spanning subtree of in which the distance between every pair of vertices is at most times their distance in .