46 search results - page 7 / 10 » Approximating the minimum directed tree cover |
JACM
2006
13 years 7 months ago
2006
Abstract. Maximum likelihood (ML) is an increasingly popular optimality criterion for selecting evolutionary trees [Felsenstein 1981]. Finding optimal ML trees appears to be a very...
IPPS
1998
IEEE
13 years 11 months ago
1998
IEEE
We address the issue of multicasting and broadcasting in wide area WDM networks in which a source broadcasts a message to all members in S V. We formalize it as the optimal multi...
COR
2007
13 years 7 months ago
2007
We present new primal-dual algorithms for several network design problems. The problems considered are the generalized Steiner tree problem (GST), the directed Steiner tree proble...
AINA
2007
IEEE
14 years 1 months ago
2007
IEEE
The construction of multicast trees is complicated by the need to balance a number of important objectives, including: minimizing latencies, minimizing depth/hops, and bounding th...
APPROX
2010
Springer
13 years 9 months ago
2010
Springer
In this paper, we consider the checkpoint problem in which given an undirected graph G, a set of sourcedestinations {(s1, t1), (s1, t1), . . . , (sk, tk)} and a set of fixed paths...