On Computing a Maximal Planar Subgraph using PQ-Trees

Jünger, Michael and Leipert, Sebastian and Mutzel, Petra (1996) On Computing a Maximal Planar Subgraph using PQ-Trees.
Technical Report , 12 p.


The problem of computing a maximal planar subgraph of a non-planar graph has been deeply investigated over the last 20 years. Several attempts have been tried to solve the problem with the help of PQ-trees. The latest attempt has been reported by Jayakumar, Thulasiraman and Swamy (1989). In this paper we show that the algorithm presented by Jayakumar et al. is not correct. We show that it does not necessarily compute a maximal planar subgraph and that the same holds for a modified version of the algorithm presented by Kant (1992). Our conclusions most likely suggest not to use PQ-trees at all for this specific problem.

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Deposit Information:
ZAIK Number: zpr96-227
Depositing User: Prof. Dr. Michael Jünger
Date Deposited: 02 Apr 2001 00:00
Last Modified: 19 Jan 2012 10:26
URI: http://e-archive.informatik.uni-koeln.de/id/eprint/227