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We answer a question of Thomassen by proving that there is a unique strongly 2-connected digraph with no even dicycle. We show the significance of this digraph to the structure of strongly connected digraphs with no even dicycles. We also prove a conjecture of Lundy. © 2000 John Wiley & Sons, Inc. J Graph Theory 35: 46–68, 2000
William McCuaig (Sat,) studied this question.
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