Ricardo Mamede

activity

20242026

collaborators

3 papers

math.CO2026

Maximum number of one-element commutation classes of a permutation

Ricardo Mamede, José Luis Santos, Diogo Soares

In this paper, we provide an upper bound for the number of one-element commutation classes of a permutation, that is, the number of reduced words in which no commutation can be app…

math.CO2025

A uniform action of the dihedral group $Z_{2} \times D_{3}$ on Littlewood--Richardson coefficients

Olga Azenhas, Alessandro Conflitti, Ricardo Mamede

We show that the dihedral group $Z_{2} \times D_{3}$ of order twelve acts faithfully on the set LR, either consisting of Littlewood-Richardson tableaux, or their companion tableaux, or…

math.CO2024

Hamilton cycles for involutions of classical types

Gonçalo Gutierres, Ricardo Mamede, José Luis Santos

Let $W_{n}$ denote any of the three families of classical Weyl groups: the symmetric groups $S_{n}$ , the hyperoctahedral groups (signed permutation groups) ${\mat…

Maximum number of one-element commutation classes of a permutation

A uniform action of the dihedral group Z2​×D3​ on Littlewood--Richardson coefficients

Hamilton cycles for involutions of classical types

A uniform action of the dihedral group $Z_{2} \times D_{3}$ on Littlewood--Richardson coefficients