2 papers
math.CO2026
Automorphisms of Kimura Hadamard Matrices
Santiago Barrera Acevedo, Melissa Lee
We investigate the structure of the automorphism groups of Kimura Hadamard matrices (KHMs) constructed from dihedral groups. We identify several different types of automorphisms, a…
math.CO2019
Constructing cocyclic Hadamard matrices of order 4p
Santiago Barrera Acevedo, Heiko Dietrich, Padraig O Cathain
Cocyclic Hadamard matrices (CHMs) were introduced by de Launey and Horadam as a class of Hadamard matrices with interesting algebraic properties. Ó Catháin and Röder described a cl…