On Embeddability of Buses in Point Sets

Bruckdorfer, Till and Kaufmann, Michael and Kobourov, Stephen G. and Pupyrev, Sergey (2015) On Embeddability of Buses in Point Sets. In: Graph Drawing and Network Visualization: 23rd International Symposium, GD 2015, September 24-26, 2015 , pp. 395-408(Official URL: http://dx.doi.org/10.1007/978-3-319-27261-0_33).

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Abstract

Set membership of points in the plane can be visualized by connecting corresponding points via graphical features, like paths, trees, polygons, ellipses. In this paper we study the bus embeddability problem (BEP): given a set of colored points we ask whether there exists a planar realization with one horizontal straight-line segment per color, called bus, such that all points with the same color are connected with vertical line segments to their bus. We present an ILP and an FPT algorithm for the general problem. For restricted versions of this problem, such as when the relative order of buses is predefined, or when a bus must be placed above all its points, we provide efficient algorithms. We show that another restricted version of the problem can be solved using 2-stack pushall sorting. On the negative side we prove the NP-completeness of a special case of BEP.

Item Type: Conference Paper
Classifications: G Algorithms and Complexity > G.490 Embeddings
G Algorithms and Complexity > G.560 Geometry
P Styles > P.540 Planar
Z Theory > Z.250 Geometry
Divisions: UNSPECIFIED
Depositing User: Administration GDEA
Date Deposited: 04 May 2016 15:54
Last Modified: 04 May 2016 15:54
URI: http://gdea.informatik.uni-koeln.de/id/eprint/1505

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