Mathematical Programming: Series A and B - Mathematical Models and Their Solutions
Maintenance of a minimum spanning forest in a dynamic plane graph
Journal of Algorithms
IEEE Transactions on Pattern Analysis and Machine Intelligence
Fast Approximation Methods for Sales Force Deployment
Management Science
Normalized Cuts and Image Segmentation
IEEE Transactions on Pattern Analysis and Machine Intelligence
A simulated annealing approach to police district design
Computers and Operations Research - Location analysis
A linear-time heuristic for improving network partitions
DAC '82 Proceedings of the 19th Design Automation Conference
Maximum Split Clustering Under Connectivity Constraints
Journal of Classification
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Political districting is an intractable problem with significant ramifications for political representation. Districts often are required to satisfy some legal constraints, but these typically are not very restrictive, allowing decision makers to influence the composition of these districts without violating relevant laws. For example, while districts must often comprise a single contiguous area, a vast collection of acceptable solutions i.e., sets of districts remains. Choosing the best set of districts from this collection can be treated as a planar graph partitioning problem. When districts must be contiguous, successfully solving this problem requires an efficient computational method for evaluating contiguity constraints; common methods for assessing contiguity can require significant computation as the problem size grows. This paper introduces the geo-graph, a new graph model that ameliorates the computational burdens associated with enforcing contiguity constraints in planar graph partitioning when each vertex corresponds to a particular region of the plane. Through planar graph duality, the geo-graph provides a scale-invariant method for enforcing contiguity constraints in local search. Furthermore, geo-graphs allow district holes which typically are considered undesirable to be rigorously and efficiently integrated into the partitioning process.