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WADS
2007
Springer
165views Algorithms» more  WADS 2007»
14 years 5 months ago
A Near Linear Time Approximation Scheme for Steiner Tree Among Obstacles in the Plane
We present a polynomial-time approximation scheme (PTAS) for the Steiner tree problem with polygonal obstacles in the plane with running time O(n log2 n), where n denotes the numb...
Matthias Müller-Hannemann, Siamak Tazari
ACTAC
2007
69views more  ACTAC 2007»
13 years 11 months ago
Synthesising Robust Schedules for Minimum Disruption Repair Using Linear Programming
An o-line scheduling algorithm considers resource, precedence, and synchronisation requirements of a task graph, and generates a schedule guaranteeing its timing requirements. Th...
Dávid Hanák, Nagarajan Kandasamy
EJC
2007
13 years 11 months ago
Partial linear spaces built on hexagons
3 We define four families of geometries with as point graph the graph — or its complement — of all elliptic 4 hyperplanes of a given parabolic quadric in any finite 6-dimensi...
Alice Devillers, Hendrik Van Maldeghem
GD
2005
Springer
14 years 4 months ago
Non-planar Core Reduction of Graphs
We present a reduction method that reduces a graph to a smaller core graph which behaves invariant with respect to planarity measures like crossing number, skewness, and thickness....
Carsten Gutwenger, Markus Chimani
GD
2001
Springer
14 years 3 months ago
A Characterization of DFS Cotree Critical Graphs
We give a characterization of DFS cotree-critical graphs which is central to the linear time Kuratowski finding algorithm implemented in PIGALE (Public Implementation of a Graph ...
Hubert de Fraysseix, Patrice Ossona de Mendez