Touching Triangle Representations for 3-Connected Planar Graphs

Kobourov, Stephen G. and Mondal, Debajyoti and Nishat, Rahnuma Islam (2013) Touching Triangle Representations for 3-Connected Planar Graphs. In: 20th International Symposium, GD 2012, September 19-21, 2012, Redmond, WA, USA , pp. 199-210 (Official URL:

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A touching triangle graph (TTG) representation of a planar graph is a planar drawing Γ of the graph, where each vertex is represented as a triangle and each edge e is represented as a side contact of the triangles that correspond to the end vertices of e. We call Γ a proper TTG representation if Γ determines a tiling of a triangle, where each tile corresponds to a distinct vertex of the input graph. In this paper we prove that every 3-connected cubic planar graph admits a proper TTG representation. We also construct proper TTG representations for parabolic grid graphs and the graphs determined by rectangular grid drawings (e.g., square grid graphs). Finally, we describe a fixed-parameter tractable decision algorithm for testing whether a 3-connected planar graph admits a proper TTG representation.

Item Type:Conference Paper
Additional Information:10.1007/978-3-642-36763-2_18
Classifications:P Styles > P.720 Straight-line
Z Theory > Z.500 Representations
ID Code:1310

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