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» Characterization of eccentric digraphs
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AUTOMATICA
2008
86views more  AUTOMATICA 2008»
13 years 5 months ago
Notes on averaging over acyclic digraphs and discrete coverage control
In this paper we study averaging algorithms and coverage control laws in a unified light. First, we characterize the convergence properties of averaging algorithms over acyclic di...
Chunkai Gao, Jorge Cortés, Francesco Bullo
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
EJC
2011
13 years 23 days ago
Distributive lattices, polyhedra, and generalized flows
A D-polyhedron is a polyhedron P such that if x, y are in P then so are their componentwise max and min. In other words, the point set of a D-polyhedron forms a distributive latti...
Stefan Felsner, Kolja B. Knauer
EJC
2008
13 years 5 months ago
On digraph coloring problems and treewidth duality
It is known that every constraint-satisfaction problem (CSP) reduces, and is in fact polynomially equivalent, to a digraph coloring problem. By carefully analyzing the constructio...
Albert Atserias
IPL
2007
121views more  IPL 2007»
13 years 5 months ago
Parameterized complexity of the induced subgraph problem in directed graphs
In this paper, we consider the parameterized complexity of the following problem: Given a hereditary property P on digraphs, an input digraph D and a positive integer k, does D ha...
Venkatesh Raman, Somnath Sikdar