Computing the Stopping Distance of a Tanner Graph Is NP-Hard

  • Authors:
  • K. M. Krishnan;P. Shankar

  • Affiliations:
  • Indian Inst. of Sci., Bangalore;-

  • Venue:
  • IEEE Transactions on Information Theory
  • Year:
  • 2007

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Abstract

Two decision problems related to the computation f stopping sets in Tanner graphs are shown to be NP-complete. It follows as a consequence that there exists no polynomial time algorithm for computing the stopping distance of a Tanner graph unless P = NP.