Abstract
Planar drawings of clustered graphs are considered. We introduce the notion of completely connected clustered graphs, i.e. hierarchically clustered graphs that have the property that not only every cluster but also each complement of a cluster induces a connected subgraph. As a main result, we prove that a completely connected clustered graph is c-planar if and only if the underlying graph is planar. Further, we investigate the influence of the root of the inclusion tree to the choice of the outer face of the underlying graph and vice versa.
This work was partially supported by the DFG under grant BR 2158/1-1 and WA 654/13-1. It was also partially supported by the Human Potential Program of the EU under contract no HPRN-CT-1999-00104 (AMORE Project).
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Cornelsen, S., Wagner, D. (2003). Completely Connected Clustered Graphs. In: Bodlaender, H.L. (eds) Graph-Theoretic Concepts in Computer Science. WG 2003. Lecture Notes in Computer Science, vol 2880. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-39890-5_15
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DOI: https://doi.org/10.1007/978-3-540-39890-5_15
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