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math.CO2019
Catalan Recursion on Externally Ordered Bases of Unit Interval Positroids
Jan Tracy Camacho
The Catalan numbers form a sequence that counts over 200 combinatorial objects. A remarkable property of the Catalan numbers, which extends to these objects, is its recursive defin…
math.CO2019
Quotients of uniform positroids
Carolina Benedetti, Anastasia Chavez, Daniel Tamayo
Flag matroids are a rich family of Coxeter matroids that can be characterized using pairs of matroids that form a quotient. We consider a class of matroids called positroids, intro…