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math.CO2021★ 1 cited
Baxter Tree-like Tableaux
Jean-Christophe Aval, Adrien Boussicault, Mathilde Bouvel +2
Tree-like tableaux are objects in bijection with alternative or permutation tableaux. They have been the subject of a fruitful combinatorial study for the past few years. In the pr…
cs.DM2021
Non-ambiguous trees: new results and generalisation (Full version)
Bérénice Delcroix-Oger, Florent Hivert, Patxi Laborde-Zubieta +2
We present a new definition of non-ambiguous trees (NATs) as labelled binary trees. We thus get a differential equation whose solution can be described combinatorially. This yields…