Saturated k-Plane Drawings with Few Edges

12/03/2020 ∙ by Fabian Klute, et al. ∙ 0

A drawing of a graph is k-plane if no edge is crossed more than k times. In this paper we study saturated k-plane drawings with few edges. This are k-plane drawings in which no edge can be added without violating k-planarity. For every number of vertices n>k+1, we present a tight construction with n-1/k+1 edges for the case in which the edges can self-intersect. If we restrict the drawings to be ℓ-simple we show that the number of edges in saturated k-plane drawings must be higher. We present constructions with few edges for different values of k and ℓ. Finally, we investigate saturated straight-line k-plane drawings.

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