Approximating Buy-at-Bulk k-Steiner trees

In the buy-at-bulk $k$-Steiner tree (or rent-or-buy$k$-Steiner tree) problem we are given a graph $G(V,E)$ with a setof terminals $T\subseteq V$ including a particular vertex $s$ calledthe root, and an integer $k\leq |T|$. There are two cost functionson the edges of $G$, a buy cost $b:E\longrightarr...

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Bibliographic Details
Main Authors: Hajiaghayi, MohammadTaghi, Kortsarz, Guy, Salavatipour, Mohammad R.
Other Authors: Erik Demaine
Language:en_US
Published: 2006
Online Access:http://hdl.handle.net/1721.1/30601