A polylogarithmic approximation of the minimum bisection

  • Authors:
  • U. Feige;R. Krauthgamer

  • Affiliations:
  • -;-

  • Venue:
  • FOCS '00 Proceedings of the 41st Annual Symposium on Foundations of Computer Science
  • Year:
  • 2000

Quantified Score

Hi-index 0.01

Visualization

Abstract

A bisection of a graph with n vertices is a partition of its vertices into two sets, each of size n/2. The bisection cost is the number of edges connecting the two sets. Finding the bisection of minimum cost is NP-hard. We present an algorithm that finds a bisection whose cost is within ratio of O(log/sup 2/ n) from the optimal. For graphs excluding any fixed graph as a minor (e.g. planar graphs) we obtain an improved approximation ratio of O(log n). The previously known approximation ratio for bisection was roughly /spl radic/n.