,
Emilio Di Giacomo
,
Fabrizio Frati
,
Robert Ganian
,
Chrysanthi N. Raftopoulou
,
Kirill Simonov
Creative Commons Attribution 4.0 International license
We obtain new parameterized algorithms for the classical problem of determining whether a directed acyclic graph admits an upward planar drawing. Our results include a new fixed-parameter algorithm parameterized by the number of sources, an XP-algorithm parameterized by treewidth, and a fixed-parameter algorithm parameterized by treedepth. All three algorithms are obtained using a novel framework for the problem that combines SPQR tree-decompositions with parameterized techniques. Our approach unifies and pushes beyond previous tractability results for the problem on series-parallel digraphs, single-source digraphs and outerplanar digraphs.
@InProceedings{chaplick_et_al:LIPIcs.SoCG.2022.26,
author = {Chaplick, Steven and Di Giacomo, Emilio and Frati, Fabrizio and Ganian, Robert and Raftopoulou, Chrysanthi N. and Simonov, Kirill},
title = {{Parameterized Algorithms for Upward Planarity}},
booktitle = {38th International Symposium on Computational Geometry (SoCG 2022)},
pages = {26:1--26:16},
series = {Leibniz International Proceedings in Informatics (LIPIcs)},
ISBN = {978-3-95977-227-3},
ISSN = {1868-8969},
year = {2022},
volume = {224},
editor = {Goaoc, Xavier and Kerber, Michael},
publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
address = {Dagstuhl, Germany},
URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.SoCG.2022.26},
URN = {urn:nbn:de:0030-drops-160349},
doi = {10.4230/LIPIcs.SoCG.2022.26},
annote = {Keywords: Upward planarity, parameterized algorithms, SPQR trees, treewidth, treedepth}
}