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CTW2006 -Cologne-Twente Workshop on Graphs and Combinatorial Optimization. Electronic Notes Discrete Math. 50 (2006), 107-111. MR2307287 (no rev). Zbl 1134.05319. ... Preface A signed graph is a graph whose edges are labeled by signs. This is a bibliography of signed graphs and related mathematics. ... See Johnson and Padberg (1982a) for definitions. §2, "Equivalence to stable set problem": Optimization on the bidirected stable set polytope is reduced to optimization on a stable set polytope with no ...fatcat:os5lveptfbbbplmcy4drb2zd3m