TY - JOUR
T1 - On strongly connected digraphs with bounded cycle length
AU - Khuller, Samir
AU - Raghavachari, Balaji
AU - Young, Neal
N1 - Funding Information:
* Corresponding author. Department of Computer Science, Dartmouth College, 6211 Sudikoff Laboratories, Hanover, NH 03755-3510, USA. E-mail: [email protected]. Part of this research was done while at School of ORIE, Cornell University, Ithaca NY 14853 and supported by l&a Tardos’ NSF PYI grant DDM-9157199. ’ Research supported by NSF Research Initiation Award CCR-9307462. 2 Research supported by NSF grant CCR-9409625.
PY - 1996
Y1 - 1996
N2 - Given a directed graph G = (V,E), a natural problem is to choose a minimum number of the edges in E such that, for any two vertices u and v, if there is a path from u to v in E, then there is a path from u to v among the chosen edges. We show that in graphs having no directed cycle with more than three edges, this problem is equivalent to Maximum Bipartite Matching. This leads to a small improvement in the performance guarantee of the previous best approximation algorithm for the general problem.
AB - Given a directed graph G = (V,E), a natural problem is to choose a minimum number of the edges in E such that, for any two vertices u and v, if there is a path from u to v in E, then there is a path from u to v among the chosen edges. We show that in graphs having no directed cycle with more than three edges, this problem is equivalent to Maximum Bipartite Matching. This leads to a small improvement in the performance guarantee of the previous best approximation algorithm for the general problem.
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U2 - 10.1016/0166-218X(95)00105-Z
DO - 10.1016/0166-218X(95)00105-Z
M3 - Article
AN - SCOPUS:0012297449
SN - 0166-218X
VL - 69
SP - 281
EP - 289
JO - Discrete Applied Mathematics
JF - Discrete Applied Mathematics
IS - 3
ER -