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» On the combinatorics of Galois numbers
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COCOON
1999
Springer
15 years 4 months ago
On Routing in Circulant Graphs
We investigate various problems related to circulant graphs – finding the shortest path between two vertices, finding the shortest loop, and computing the diameter. These probl...
Jin-yi Cai, George Havas, Bernard Mans, Ajay Nerur...
COCOON
1997
Springer
15 years 4 months ago
Edge and Node Searching Problems on Trees
In this paper, we consider the edge searching and node searching problems on trees. Given a tree, we show a transformation from an optimal node-search strategy to an optimal edge-...
Sheng-Lung Peng, Chin-Wen Ho, Tsan-sheng Hsu, Ming...
COCOON
2006
Springer
15 years 3 months ago
Restricted Mesh Simplification Using Edge Contractions
We consider the problem of simplifying a triangle mesh using edge contractions, under the restriction that the resulting vertices must be a subset of the input set. That is, contr...
Mattias Andersson, Joachim Gudmundsson, Christos L...
COCOON
2006
Springer
15 years 3 months ago
A Polynomial-Time Approximation Algorithm for a Geometric Dispersion Problem
We consider the problem of placing a set of disks in a region containing obstacles such that no two disks intersect. We are given a bounding polygon P and a set R of possibly inte...
Marc Benkert, Joachim Gudmundsson, Christian Knaue...
CPM
2005
Springer
125views Combinatorics» more  CPM 2005»
15 years 1 months ago
Parametric Analysis for Ungapped Markov Models of Evolution
We present efficient sensitivity-analysis algorithms for two problems involving Markov models of sequence evolution: ancestral reconstruction in evolutionary trees and local ungap...
David Fernández-Baca, Balaji Venkatachalam