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Hierarchies and planarity theory

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2 Author(s)
Di Battista, G. ; Dept. of Inf. & Syst., Roma Univ., Italy ; Nardelli, E.

In diagrammatic representations of hierarchies the minimization of the number of crossings between edges is a well-known criterion for improving readability. An efficient algorithm for testing if a hierarchy is planar (i.e. if it can be drawn without edge crossings) is proposed. A complete combinatorial characterization of the class of planar hierarchies is also given

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Systems, Man and Cybernetics, IEEE Transactions on  (Volume:18 ,  Issue: 6 )