2 papers
math.RA2021
Decompositions and eigenvectors of Riordan matrices
Gi-Sang Cheon, Marshall M. Cohen, Nikolaos Pantelidis
Riordan matrices are infinite lower triangular matrices determined by a pair of formal power series over the real or complex field. These matrices have been mainly studied as combi…
math.CO2019
On pseudo-involutions, involutions and quasi-involutions in the group of almost Riordan arrays
Paul Barry, Nikolaos Pantelidis
The group of almost Riordan arrays contains the group of Riordan arrays as a subgroup. In this note, we exhibit examples of pseudo-involutions, involutions and quasi-involutions in…