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» The Longest Path Problem Is Polynomial on Interval Graphs
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FOCS
1999
IEEE
13 years 11 months ago
The Directed Steiner Network Problem is Tractable for a Constant Number of Terminals
We consider the DIRECTED STEINER NETWORK problem, also called the POINT-TO-POINT CONNECTION problem, where given a directed graph G and p pairs {(s1,t1),...,(sp,tp)} of nodes in t...
Jon Feldman, Matthias Ruhl
WADS
2007
Springer
155views Algorithms» more  WADS 2007»
14 years 1 months ago
Constant Factor Approximations for the Hotlink Assignment Problem
An approach for reducing the navigation effort for the users of a web site is to enhance its hyperlink structure with additional hotlinks. We address the task of adding at most on...
Tobias Jacobs
ESA
2005
Springer
176views Algorithms» more  ESA 2005»
14 years 28 days ago
On Degree Constrained Shortest Paths
Abstract. Traditional shortest path problems play a central role in both the design and use of communication networks and have been studied extensively. In this work, we consider a...
Samir Khuller, Kwangil Lee, Mark A. Shayman
SODA
1998
ACM
157views Algorithms» more  SODA 1998»
13 years 8 months ago
A Polynomial Time Approximation Scheme for Minimum Routing Cost Spanning Trees
Given an undirected graph with nonnegative costs on the edges, the routing cost of any of its spanning trees is the sum over all pairs of vertices of the cost of the path between t...
Bang Ye Wu, Giuseppe Lancia, Vineet Bafna, Kun-Mao...
DAM
1999
128views more  DAM 1999»
13 years 7 months ago
Graph Classes Between Parity and Distance-hereditary Graphs
Several graph problems (e.g., steiner tree, connected domination, hamiltonian path, and isomorphism problem), which can be solved in polynomial time for distance-hereditary graphs...
Serafino Cicerone, Gabriele Di Stefano