37 citations · 193 across the 39 of their papers we have counts for
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Restricted Birkhoff polytopes and Ehrhart period collapse
Per Alexandersson, Sam Hopkins, Gjergji Zaimi
We show that the polytopes obtained from the Birkhoff polytope by imposing additional inequalities restricting the "longest increasing subsequence" have Ehrhart quasi-polynomials w…
Linear first order differential operators and their Hutchinson-invariant sets
Per Alexandersson, Nils Hemmingsson, Dmitry Novikov +2
In this paper, we initiate the study of a new interrelation between linear ordinary differential operators and complex dynamics which we discuss in details in the simplest case of…
Pattern-avoidance and Fuss-Catalan numbers
Per Alexandersson, Samuel Asefa Fufa, Frether Getachew +1
We study a subset of permutations, where entries are restricted to having the same remainder as the index, modulo some integer . We show that when also imposing the class…