Abstract
A fan-planar graph is a graph that admits a drawing, in which each edge can cross only edges with a common endvertex, and this endvertex is on the same side of the edge. Hence, by definition, fan-planar graphs extend the class of 1-planar graphs, but still form a proper subclass of 3-quasiplanar graphs, as they cannot contain three mutually crossing edges. Similarly to several other classes of beyond-planar graphs, fan-planar graphs have a linear number of edges, it is NP-hard to recognize them (both in general and in the fixed rotation system setting), while polynomial-time recognition and drawing algorithms are known only for special variants of them. In this chapter, we review known combinatorial and algorithmic results on fan-planar graphs and we identify several open problems in the field.
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Acknowledgements
The authors’ research was supported in part by the DFG grant KA812/18-1 and by the scientific project: “Algoritmi e sistemi di analisi visuale di reti complesse e di grandi dimensioni” - Ricerca di Base 2017, Dipartimento di Ingegneria dell’Università degli Studi di Perugia.
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Bekos, M.A., Grilli, L. (2020). Fan-Planar Graphs. In: Hong, SH., Tokuyama, T. (eds) Beyond Planar Graphs. Springer, Singapore. https://doi.org/10.1007/978-981-15-6533-5_8
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DOI: https://doi.org/10.1007/978-981-15-6533-5_8
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