Approximation algorithms
Proceedings of the Fifth Colloquium on Automata, Languages and Programming
A Factor 2 Approximation Algorithm for the Generalized Steiner Network Problem
FOCS '98 Proceedings of the 39th Annual Symposium on Foundations of Computer Science
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Let G = (V(G), E(G)) be a graph and let C be the collection of its cycles. Let p: E(G) ↣ Z+&Ogr;? be a non-negative, integer-valued function on its edge set.The CYCLE COVER PROBLEM is the optimization problem of finding a multiset a of cycles of G such that each edge e ∈ E is in at least p(e) of the cycles in a and such that the sum of the lengths of all cycles in a is minimum.We will show how to approximate within a factor of 8 the optimum value of the cycle cover problem for planar graphs in polynomial time.