34 search results - page 1 / 7 » A Near-Tight Bound for the Online Steiner Tree Problem in Gr... |
ESA
2008
Springer
13 years 6 months ago
2008
Springer
The edge asymmetry of a directed, edge-weighted graph is defined as the maximum ratio of the weight of antiparallel edges in the graph, and can be used as a measure of the heterog...
WADS
2009
Springer
13 years 11 months ago
2009
Springer
Abstract. A central issue in the design of modern communication networks is the provision of Quality-of-Service (QoS) guarantees at the presence of heterogeneous users. For instanc...
ICALP
2011
Springer
12 years 8 months ago
2011
Springer
Given a directed graph G = (V, E) and an integer k ≥ 1, a Steiner k-transitive-closure-spanner (Steiner k-TC-spanner) of G is a directed graph H = (VH , EH ) such that (1) V ⊆ ...
SODA
2008
ACM
13 years 6 months ago
2008
ACM
In this paper, we study online algorithms when the input is not chosen adversarially, but consists of draws from some given probability distribution. While this model has been stu...
NETWORKS
2006
13 years 4 months ago
2006
Abstract. The Steiner tree problem is to find a shortest subgraph that spans a given set of vertices in a graph. This problem is known to be NP-hard and it is well known that a pol...