Two-Layer Planarization: Improving on Parameterized Algorithmics
Two-Layer Planarization: Improving on Parameterized Algorithmics
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两层平坦化:参数化算法的改进
DOI:
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发表时间:
2005
期刊:
影响因子:
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通讯作者:
H. Fernau
中科院分区:
文献类型:
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作者:
H. Fernau
A bipartite graph is biplanar if the vertices can be placed on two parallel lines in the plane such that there are no edge crossings when edges are drawn as straight-line segments. We study two problems:2-Layer Planarization: can k edges be deleted from a given graph G so that the remaining graph is biplanar?
1-Layer Planarization: same question, but the order of the vertices on one layer is fixed.
Improving on earlier works of Dujmovic et al. [4], we solve the 2-Layer Planarization problem in $mathcal{O}(k^{2}cdot 5.1926^{k} +|G|)$ time and the 1-Layer Planarization problem in $mathcal{O}(k^{3} cdot 2.5616^{k} + |G|^{2})$ time. Moreover, we derive a small problem kernel for 1-Layer Planarization.