TY - JOUR
T1 - A 1.5-approximation algorithm for augmenting edge-connectivity of a graph from 1 to 2
AU - Even, Guy
AU - Kortsarz, Guy
AU - Nutov, Zeev
N1 - Funding Information:
✩ Preliminary version in APPROX 2001, pp. 90–101. * Corresponding author. E-mail addresses: [email protected] (G. Even), [email protected] (G. Kortsarz), [email protected] (Z. Nutov). 1 Partially supported by NSF grant number 0728787.
PY - 2011/2/15
Y1 - 2011/2/15
N2 - We consider the following NP-hard problem: given a connected graph G=(V,ε) and a link set E on V disjoint to ε, find a minimum size subset of edges F ⊆ E such that (V,ε∪F) is 2-edge-connected. In G. Even et al. (2005) [2] we presented a 1.8-approximation for the problem. In this paper we improve the ratio to 1.5.
AB - We consider the following NP-hard problem: given a connected graph G=(V,ε) and a link set E on V disjoint to ε, find a minimum size subset of edges F ⊆ E such that (V,ε∪F) is 2-edge-connected. In G. Even et al. (2005) [2] we presented a 1.8-approximation for the problem. In this paper we improve the ratio to 1.5.
KW - Approximation algorithms
KW - Laminar family
KW - Tree augmentation
UR - http://www.scopus.com/inward/record.url?scp=78650268807&partnerID=8YFLogxK
U2 - 10.1016/j.ipl.2010.12.010
DO - 10.1016/j.ipl.2010.12.010
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AN - SCOPUS:78650268807
SN - 0020-0190
VL - 111
SP - 296
EP - 300
JO - Information Processing Letters
JF - Information Processing Letters
IS - 6
ER -