Given a tournament with an acyclic tournament as a feedback arc set we give necessary and sufficient conditions for this feedback arc set to have minimum size.
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Garth Isaak, Darren A. Narayan, A classification of tournaments having an acyclic tournament as a minimum feedback arc set, Information Processing Letters, Volume 92, Issue 3, 2004, Pages 107-111, ISSN 0020-0190, https://doi.org/10.1016/j.ipl.2004.07.001.
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