A Polynomial Kernel for Feedback Arc Set on Bipartite Tournaments

  • Authors:
  • Pranabendu Misra;Venkatesh Raman;M. S. Ramanujan;Saket Saurabh

  • Affiliations:
  • Institute of Mathematical Sciences, Taramani, India 600113;Institute of Mathematical Sciences, Taramani, India 600113;Institute of Mathematical Sciences, Taramani, India 600113;Institute of Mathematical Sciences, Taramani, India 600113

  • Venue:
  • Theory of Computing Systems
  • Year:
  • 2013

Quantified Score

Hi-index 0.00

Visualization

Abstract

In the k-Feedback Arc/Vertex Set problem we are given a directed graph D and a positive integer k and the objective is to check whether it is possible to delete at most k arcs/vertices from D to make it acyclic. Dom et al. (J. Discrete Algorithm 8(1):76---86, 2010) initiated a study of the Feedback Arc Set problem on bipartite tournaments (k-FASBT) in the realm of parameterized complexity. They showed that k-FASBT can be solved in time O(3.373 k n 6) on bipartite tournaments having n vertices. However, until now there was no known polynomial sized problem kernel for k-FASBT. In this paper we obtain a cubic vertex kernel for k-FASBT. This completes the kernelization picture for the Feedback Arc/Vertex Set problem on tournaments and bipartite tournaments, as for all other problems polynomial kernels were known before. We obtain our kernel using a non-trivial application of "independent modules" which could be of independent interest.