Computing maximum upward planar subgraphs of single-source embedded digraphs | Journal of Combinatorial Optimization
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Computing maximum upward planar subgraphs of single-source embedded digraphs

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Abstract

We show how to compute a maximum upward planar single-source subgraph of a single-source embedded DAG G φ . We first show that finding a maximum upward planar subgraph of a single-source embedded digraph is NP-complete. We then give a new characterization of upward planar single-source digraphs. We use this characterization to present an algorithm that computes a maximum upward planar single-source subgraph of a single-source embedded DAG. This algorithm takes O(n 4) time in the worst case and O(n 3) time on average.

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Authors and Affiliations

  1. Department of Computing, School of Electrical Engineering and Computer Science, National University of Sciences and Technology (NUST), Islamabad, Pakistan

    Aimal Rextin

  2. Computer Science Department, University of Limerick, Limerick, Ireland

    Patrick Healy

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  1. Aimal Rextin
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  2. Patrick Healy
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Correspondence to Aimal Rextin.

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Rextin, A., Healy, P. Computing maximum upward planar subgraphs of single-source embedded digraphs. J Comb Optim 25, 368–392 (2013). https://doi.org/10.1007/s10878-010-9373-z

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  • DOI: https://doi.org/10.1007/s10878-010-9373-z

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