Showing 2026Show all
3 papers · 1 filter
math.CO2026
Enumerations and Bijections for Stanley Polyominoes
Jean-Luc Baril, Aubrey Blecher, José Luis ramírez
Stanley polyominoes are a subclass of parallelogram polyominoes in which each row begins strictly to the right of the beginning of the previous row and ends strictly to the right o…
math.CO2026
Diagonals in Riordan matrices and applications
Gi-Sang Cheon, Ana Luzón, Manuel A. Morón +1
We introduce a method for describing Riordan matrices via recurrence relations along their diagonals. This provides a new structural description that complements the classical row-…
math.CO2026
Black Cell Capacity in Catalan polyominoes
Jean-Luc Baril, Sela Fried, Nathanaël Hassler +1
A Catalan word is a sequence of nonnegative integers such that and for . Given a Catalan word, we construct a column…