Inicio  /  Algorithms  /  Vol: 13 Par: 8 (2020)  /  Artículo
ARTÍCULO
TITULO

Graph Planarity by Replacing Cliques with Paths

Patrizio Angelini    
Peter Eades    
Seok-Hee Hong    
Karsten Klein    
Stephen Kobourov    
Giuseppe Liotta    
Alfredo Navarra and Alessandra Tappini    

Resumen

This paper introduces and studies the following beyond-planarity problem, which we call h-Clique2Path Planarity. Let G be a simple topological graph whose vertices are partitioned into subsets of size at most h, each inducing a clique. h-Clique2Path Planarity asks whether it is possible to obtain a planar subgraph of G by removing edges from each clique so that the subgraph induced by each subset is a path. We investigate the complexity of this problem in relation to k-planarity. In particular, we prove that h-Clique2Path Planarity is NP-complete even when h=4" role="presentation">h=4h=4 h = 4 and G is a simple 3-plane graph, while it can be solved in linear time when G is a simple 1-plane graph, for any value of h. Our results contribute to the growing fields of hybrid planarity and of graph drawing beyond planarity.