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math.CO2008
Six bijections between deco polyominoes and permutations
Emeric Deutsch, Elisa Pergola, Renzo Pinzani
In this paper we establish six bijections between a particular class of polyominoes, called deco polyominoes, enumerated according to their directed height by n!, and permutations.…
math.CO2008
Mixed succession rules: the commutative case
Silvia Bacchelli, Luca Ferrari, Renzo Pinzani +1
We begin a systematic study of the enumerative combinatorics of mixed succession rules, which are succession rules such that, in the associated generating tree, the nodes are allow…