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» Digraphs: theory, algorithms and applications
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TCS
2008
13 years 5 months ago
Digraph measures: Kelly decompositions, games, and orderings
We consider various well-known, equivalent complexity measures for graphs such as elimination orderings, k-trees and cops and robber games and study their natural translations to ...
Paul Hunter, Stephan Kreutzer
COCO
2010
Springer
152views Algorithms» more  COCO 2010»
13 years 9 months ago
A Log-Space Algorithm for Reachability in Planar Acyclic Digraphs with Few Sources
Designing algorithms that use logarithmic space for graph reachability problems is fundamental to complexity theory. It is well known that for general directed graphs this problem...
Derrick Stolee, Chris Bourke, N. V. Vinodchandran
JGAA
2006
75views more  JGAA 2006»
13 years 5 months ago
Upward Planar Drawings and Switch-regularity Heuristics
In this paper we present a new characterization of switch-regular upward embeddings, a concept introduced by Di Battista and Liotta in 1998. This characterization allows us to def...
Walter Didimo
LPNMR
2001
Springer
13 years 10 months ago
Multi-dimensional Dynamic Knowledge Representation
Abstract. According to Dynamic Logic Programming (DLP), knowledge may be given by a sequence of theories (encoded as logic programs) representing different states of knowledge. Th...
João Alexandre Leite, José Jú...
DAM
2007
85views more  DAM 2007»
13 years 5 months ago
Further mathematical properties of Cayley digraphs applied to hexagonal and honeycomb meshes
In this paper, we extend known relationships between Cayley digraphs and their subgraphs and coset graphs with respect to subgroups to obtain a number of general results on homomo...
Wenjun Xiao, Behrooz Parhami