Title
On the Tractability of Shortest Path Problems in Weighted Edge-Coloured Graphs.
Abstract
A weighted edge-coloured graph is a graph for which each edge is assigned both a positive weight and a discrete colour, and can be used to model transportation and computer networks in which there are multiple transportation modes. In such a graph paths are compared by their total weight in each colour, resulting in a Pareto set of minimal paths from one vertex to another. This paper will give a tight upper bound on the cardinality of a minimal set of paths for any weighted edge-coloured graph. Additionally, a bound is presented on the expected number of minimal paths in weighted edge–bicoloured graphs. These bounds indicate that despite weighted edge-coloured graphs are theoretically intractable, amenability to computation is typically found in practice.
Year
DOI
Venue
2018
10.1007/s11424-017-6138-0
J. Systems Science & Complexity
Keywords
Field
DocType
Edge-coloured chain graph, minimal paths, multimodal networks, Pareto set cardinality, upper bounds
Block graph,Discrete mathematics,Combinatorics,Mathematical optimization,Indifference graph,Line graph,Distance-hereditary graph,Independent set,Cograph,Pathwidth,Planar graph,Mathematics
Journal
Volume
Issue
ISSN
31
2
1009-6124
Citations 
PageRank 
References 
0
0.34
5
Authors
2
Name
Order
Citations
PageRank
Andrew Ensor1104.23
Felipe Lillo221.79