We consider relations between the size, treewidth, and local crossing number (maximum number of crossings per edge) of graphs embedded on topological surfaces. We show that an n-vertex graph embedded on a surface of genus g with at most k crossings per edge has treewidth (Formula presented.) and layered treewidth (Formula presented.), and that these bounds are tight up to a constant factor. A a special case, the k-planar graphs with n vertices have treewidth (Formula presented.) and layered treewidth O(k + 1), which are tight bounds that improve a previously known (Formula presented.) treewidth bound. Additionally, we show that for g < m, every m-edge graph can be embedded on a surface of genus g with (Formula presented.) crossings per edge, which is tight to a polylogarithmic factor.
CITATION STYLE
Dujmović, V., Eppstein, D., & Wood, D. R. (2015). Genus, treewidth, and local crossing number. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 9411, pp. 87–98). Springer Verlag. https://doi.org/10.1007/978-3-319-27261-0_8
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