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On multiway cut parameterized above lower bounds

Published: 29 May 2013 Publication History

Abstract

We introduce a concept of parameterizing a problem above the optimum solution of its natural linear programming relaxation and prove that the node multiway cut problem is fixed-parameter tractable (FPT) in this setting. As a consequence we prove that node multiway cut is FPT, when parameterized above the maximum separating cut, resolving an open problem of Razgon.
Our results imply O*(4k) algorithms for vertex cover above maximum matching and almost 2-SAT as well as an O*(2k) algorithm for node multiway cut with a standard parameterization by the solution size, improving previous bounds for these problems.

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cover image ACM Transactions on Computation Theory
ACM Transactions on Computation Theory  Volume 5, Issue 1
May 2013
58 pages
ISSN:1942-3454
EISSN:1942-3462
DOI:10.1145/2462896
Issue’s Table of Contents
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Association for Computing Machinery

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Publication History

Published: 29 May 2013
Accepted: 01 January 2013
Received: 01 February 2012
Revised: 01 November 2011
Published in TOCT Volume 5, Issue 1

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Author Tags

  1. Fixed parameter tractability
  2. linear programming
  3. multiway cut
  4. parameterized algorithms

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  • (2024)A fast algorithm for MaxSAT above half number of clausesProceedings of the Thirty-Third International Joint Conference on Artificial Intelligence10.24963/ijcai.2024/214(1935-1943)Online publication date: 3-Aug-2024
  • (2024)On Weighted Graph Separation Problems and Flow AugmentationSIAM Journal on Discrete Mathematics10.1137/22M153118X38:1(170-189)Online publication date: 8-Jan-2024
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