Approximation Algorithm for Sparsest k-Partitioning
Approximation Algorithm for Sparsest k-Partitioning
复制标题
最稀疏 k 划分的近似算法
DOI:
--
复制
发表时间:
2013
期刊:
影响因子:
--
通讯作者:
K. Makarychev
中科院分区:
文献类型:
--
作者:
Anand Louis;K. Makarychev
Given a graph G, the sparsest-cut problem asks to find the set of vertices S which has the least expansion defined as
[EQUATION]
where w is the total edge weight of a subset. Here we study the natural generalization of this problem: given an integer k, compute a k-partition {P1, ..., Pk} of the vertex set so as to minimize
[EQUATION]
Our main result is a polynomial time bi-criteria approximation algorithm which outputs a (1 -- e)k-partition of the vertex set such that each piece has expansion at most [EQUATION] times OPT. We also study balanced versions of this problem.