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Toppleable Permutations, Excedances and Acyclic Orientations. (arXiv:2010.11236v1 [math.CO]) http://arxiv.org/abs/2010.11236
Toppleable Permutations, Excedances and Acyclic Orientations. (arXiv:2010.11236v1 [math.CO]) http://arxiv.org/abs/2010.11236