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» On cyclically orientable graphs
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JAIR
2008
123views more  JAIR 2008»
13 years 8 months ago
The Computational Complexity of Dominance and Consistency in CP-Nets
We investigate the computational complexity of testing dominance and consistency in CP-nets. Up until now, the complexity of dominance has been determined only for restricted clas...
Judy Goldsmith, Jérôme Lang, Miroslaw...
JCT
2011
83views more  JCT 2011»
13 years 3 months ago
Sandpile groups and spanning trees of directed line graphs
Abstract. We generalize a theorem of Knuth relating the oriented spanning trees of a directed graph G and its directed line graph LG. The sandpile group is an abelian group associa...
Lionel Levine
WABI
2010
Springer
124views Bioinformatics» more  WABI 2010»
13 years 6 months ago
Improved Orientations of Physical Networks
Abstract. The orientation of physical networks is a prime task in deciphering the signaling-regulatory circuitry of the cell. One manifestation of this computational task is as a m...
Iftah Gamzu, Danny Segev, Roded Sharan
CATS
2008
13 years 10 months ago
Graph Classes and the Complexity of the Graph Orientation Minimizing the Maximum Weighted Outdegree
Given an undirected graph with edge weights, we are asked to find an orientation, i.e., an assignment of a direction to each edge, so as to minimize the weighted maximum outdegree...
Yuichi Asahiro, Eiji Miyano, Hirotaka Ono
RTA
2009
Springer
14 years 3 months ago
A Heterogeneous Pushout Approach to Term-Graph Transformation
We address the problem of cyclic termgraph rewriting. We propose a new framework where rewrite rules are tuples of the form (L, R, τ, σ) such that L and R are termgraphs represen...
Dominique Duval, Rachid Echahed, Fréd&eacut...