An FPT algorithm for edge subset feedback edge set

  • Authors:
  • Mingyu Xiao;Hiroshi Nagamochi

  • Affiliations:
  • School of Computer Science and Engineering, University of Electronic Science and Technology of China, China;Department of Applied Mathematics and Physics, Graduate School of Informatics, Kyoto University, Japan

  • Venue:
  • Information Processing Letters
  • Year:
  • 2012

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Abstract

Given a graph G=(V,E) with a subset S@?E of edges, the edge subset feedback edge set problem is to find a smallest set F of edges such that in G^'=(V,E-F) no cycle contains an edge in S. We also define a restricted version of this problem, in which no edge in S is allowed to be selected into F to form a solution. In this paper, we give a linear-time algorithm for the edge subset feedback edge set problem, and show that the restricted version is NP-hard for fixed |S|=2 and fixed-parameter tractable with parameter being k=|F|.