Ronan Egan

activity

20152019

collaborators

3 papers

math.CO2019

Generalized Hadamard full propelinear codes

José Andrés Armario, Ivan Bailera, Ronan Egan

Codes from generalized Hadamard matrices have already been introduced. Here we deal with these codes when the generalized Hadamard matrices are cocyclic. As a consequence, a new cl…

math.CO2017

Morphisms of Butson classes

Ronan Egan, Padraig Ó Catháin

We introduce the concept of a morphism from the set of Butson Hadamard matrices over kth roots of unity to the set of Butson matrices over $ℓ$ th roots of unity. As concrete exam…

math.CO2015

Classifying cocyclic Butson Hadamard matrices

Ronan Egan, Dane Flannery, Padraig Ó Catháin

We classify all the cocyclic Butson Hadamard matrices $BH (n, p)$ of order $n$ over the $p$ th roots of unity for an odd prime $p$ and $n p \leq 100$ . That is, we compile a lis…