We define the notion of disk-obedience for a set of disks in the plane and give results for diskobedient graphs (DOGs), which are disk intersection graphs (DIGs) that admit a planar embedding with vertices inside the corresponding disks. We show that in general it is hard to recognize a DOG, but when the DIG is thin and unit (i.e., when the disks are unit disks), it can be done in linear time.
@InProceedings{evans_et_al:LIPIcs.FUN.2016.16, author = {Evans, William and van Garderen, Mereke and L\"{o}ffler, Maarten and Polishchuk, Valentin}, title = {{Recognizing a DOG is Hard, But Not When It is Thin and Unit}}, booktitle = {8th International Conference on Fun with Algorithms (FUN 2016)}, pages = {16:1--16:12}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-005-7}, ISSN = {1868-8969}, year = {2016}, volume = {49}, editor = {Demaine, Erik D. and Grandoni, Fabrizio}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.FUN.2016.16}, URN = {urn:nbn:de:0030-drops-58671}, doi = {10.4230/LIPIcs.FUN.2016.16}, annote = {Keywords: graph drawing, planar graphs, disk intersection graphs} }
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