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math.CO2021★ 3 cited
On the -Enumeration of Barely Set-Valued Tableaux and Plane Partitions
Sam Hopkins, Alexander Lazar, Svante Linusson
Barely set-valued tableaux are a variant of Young tableaux in which one box contains two numbers as its entry. It has recently been discovered that there are product formulas enume…
math.CO2021★ 5 cited
Symmetry of Narayana numbers and rowvacuation of root posets
Colin Defant, Sam Hopkins
For a Weyl group of rank , the -Catalan number is the number of antichains of the poset of positive roots, and the -Narayana numbers refine the -Catalan number by k…