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Paper detail

Product-Coproduct Prographs and Triangulations of the Sphere

In this paper, we explain how the classical Catalan families of objects involving paths, tableaux, triangulations, parentheses configurations and more generalize canonically to a three-dimensional version. In particular, we present product-coproduct prographs as central objects explaining the combinatorics of the triangulations of the sphere. Then we expose a natural way to extend the Tamari lattice to the product-coproduct prographs.

preprint2022arXivOpen access
Nicolas BorieJustine Falque
math.CODiscrete Mathematics
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Nicolas BorieJustine Falque

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