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Idempotent Varieties of Incidence Monoids and Bipartite Posets. (arXiv:2208.01073v1 [math.CO]) http://arxiv.org/abs/2208.01073
Idempotent Varieties of Incidence Monoids and Bipartite Posets. (arXiv:2208.01073v1 [math.CO]) http://arxiv.org/abs/2208.01073