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Abstract:
The min-min problem of finding a disjoint path pair with the length of the shorter path minimized is known to be NP-complete (Xu et al., 2006) [1]. In this paper, we prove that in planar digraphs the edge-disjoint min-min problem remains NP-complete and admits no K-approximation for any K > 1 unless P = NP. As a by-product, we show that this problem remains NP-complete even when all edge costs are equal (i.e., strongly NP-complete). To our knowledge, this is the first NP-completeness proof for the edge-disjoint min-min problem in planar digraphs. (C) 2012 Published by Elsevier B.V.
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THEORETICAL COMPUTER SCIENCE
ISSN: 0304-3975
Year: 2012
Volume: 432
Page: 58-63
0 . 4 8 9
JCR@2012
0 . 9 0 0
JCR@2023
ESI Discipline: COMPUTER SCIENCE;
JCR Journal Grade:4
CAS Journal Grade:4
Cited Count:
WoS CC Cited Count: 5
SCOPUS Cited Count: 7
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 0
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