3 papers
math.CO2026
A bijection between peakless Motzkin paths and LR tableaux
Milan Tenn
We prove the conjecture of Donnelly et al. that a certain class of Littlewood-Richardson tableaux are equinumerous with peakless Motzkin paths of length . Furthermore, we constr…
math.CO2026
Lattice walks, pattern statistics, and Riordan arrays
Milan Tenn
We introduce a new class of Riordan matrices corresponding to lattice walks with colored steps. We show that this class corresponds to a class of pseudo-involutions and then find b…
math.CO2025
The autotopism group of a family of commutative semifields
Lukas Kölsch, Alexandra Levinshteyn, Milan Tenn
We completely determine the autotopism group of the (as of now) largest family of commutative semifields found by Göloğlu and Kölsch. Since this family of semifields generally does…