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Planar Octilinear Drawings with One Bend Per Edge

机译:每边一弯的平面八边形图

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In octilinear drawings of planar graphs, every edge is drawn as a sequence of horizontal, vertical and diagonal (45°) line segments. In this paper, we study octilinear drawings of low edge complexity, i.e., with few bends per edge. A k -planar graph is a planar graph in which each vertex has degree at most k . In particular, we prove that every 4-planar graph admits a planar octilinear drawing with at most one bend per edge on an integer grid of size O ( n 2) × O ( n ). For 5-planar graphs, we prove that one bend per edge still suffices in order to construct planar octilinear drawings, but in super-polynomial area. However, for 6-planar graphs we give a class of graphs whose planar octilinear drawings require at least two bends per edge for some edges.
机译:在平面图的八边形图中,每个边都绘制为水平,垂直和对角线(45 °)线段的序列。在本文中,我们研究了边缘复杂度低的八边形图,即每条边很少弯曲。 k平面图是一个平面图,其中每个顶点的度数最多为k。特别是,我们证明了,每张4平面图都接受一个平面八边形图形,该图形在大小为O(n 2 )×O(n)的整数网格上每个边缘最多具有一个折弯。对于5平面图,我们证明,在超多项式区域中,为了构造平面八边形图形,每个边缘一个弯曲仍然足够。但是,对于6平面图,我们给出了一类图,这些图的平面八边形图形要求某些边缘的每个边缘至少弯曲两次。

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