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FSTTCS
2007
Springer
15 years 4 months ago
Better Algorithms and Bounds for Directed Maximum Leaf Problems
The Directed Maximum Leaf Out-Branching problem is to find an out-branching (i.e. a rooted oriented spanning tree) in a given digraph with the maximum number of leaves. In this pa...
Noga Alon, Fedor V. Fomin, Gregory Gutin, Michael ...
ISAAC
2005
Springer
89views Algorithms» more  ISAAC 2005»
15 years 3 months ago
Multi-source Trees: Algorithms for Minimizing Eccentricity Cost Metrics
We consider generalizations of the k-source sum of vertex eccentricity problem (k-SVET) and the k-source sum of source eccentricity problem (k-SSET) [1], which we call SDET and SSE...
Paraskevi Fragopoulou, Stavros D. Nikolopoulos, Le...
PODC
1989
ACM
15 years 1 months ago
Multiple Communication in Multi-Hop Radio Networks
Two tasks of communication in a multi-hop synchronous radio network are considered: point-to-point communication and broadcast (sending a message to all nodes of a network). Effi...
Reuven Bar-Yehuda, Amos Israeli
IPL
2008
129views more  IPL 2008»
14 years 10 months ago
Parameterized approximation of dominating set problems
A problem open for many years is whether there is an FPT algorithm that given a graph G and parameter k, either: (1) determines that G has no k-Dominating Set, or (2) produces a do...
Rodney G. Downey, Michael R. Fellows, Catherine Mc...
COMBINATORICS
1998
89views more  COMBINATORICS 1998»
14 years 9 months ago
Venn Diagrams with Few Vertices
An n-Venn diagram is a collection of n finitely-intersecting simple closed curves in the plane, such that each of the 2n sets X1 ∩X2 ∩· · ·∩Xn, where each Xi is the open...
Bette Bultena, Frank Ruskey