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@article{1372354,
author = {Chimani, Markus and Hliněný, Petr},
article_number = {4},
doi = {http://dx.doi.org/10.1007/s10878-016-0030-z},
keywords = {Planar graph; Multiple edge insertion; SPQR tree; Crossing number},
language = {eng},
issn = {1382-6905},
journal = {Journal of Combinatorial Optimization},
title = {A tighter insertion-based approximation of the crossing number},
volume = {33},
year = {2017}
}
TY - JOUR
ID - 1372354
AU - Chimani, Markus - Hliněný, Petr
PY - 2017
TI - A tighter insertion-based approximation of the crossing number
JF - Journal of Combinatorial Optimization
VL - 33
IS - 4
SP - 1183-1225
EP - 1183-1225
PB - Springer
SN - 13826905
KW - Planar graph
KW - Multiple edge insertion
KW - SPQR tree
KW - Crossing number
N2 - Let G be a planar graph and F a set of additional edges not yet in G. The multiple edge insertion problem (MEI) asks for a drawing of G+F with the minimum number of pairwise edge crossings, such that the subdrawing of G is plane. Finding an exact solution to MEI is NP-hard for general F. We present the first polynomial time algorithm for MEI that achieves an additive approximation guarantee—depending only on the size of F and the maximum degree of G, in the case of connected G. Our algorithm seems to be the first directly implementable one in that realm, too, next to the single edge insertion. It is also known that an (even approximate) solution to the MEI problem would approximate the crossing number of the F-almost-planar graph G+F, while computing the crossing number of G+F exactly is NP-hard already when |F|=1. Hence our algorithm induces new, improved approximation bounds for the crossing number problem of F-almost-planar graphs, achieving constant-factor approximation for the large class of such graphs of bounded degrees and bounded size of F.
ER -
CHIMANI, Markus a Petr HLINĚNÝ. A tighter insertion-based approximation of the crossing number. \textit{Journal of Combinatorial Optimization}. Springer, roč.~33, č.~4, s.~1183-1225. ISSN~1382-6905. doi:10.1007/s10878-016-0030-z. 2017.
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