4 papers
Complex generalised weighing matrices in centraliser algebras of monomial representations
Ronan Egan, Padraig à Catháin, Andrea Švob
An matrix with exactly non-zero entries taken from the set of complex roots of unity in each row and column satisfying is a com…
A universal theory of switching for combinatorial objects, and applications to complex Hadamard matrices
Dean CrnkoviÄ, Ronan Egan, Andrea Å vob
The concept of switching has arisen in several different areas within combinatorics. The act of switching usually transforms a combinatorial object into a non-isomorphic object of…
A generalisation of bent vectors for Butson Hadamard matrices
José Andrés Armario, Ronan Egan, Hadi Kharaghani +1
An complex matrix with entries in the roots of unity which satisfies is called a Butson Hadamard matrix. While a matrix with…
Centraliser algebras of monomial representations and applications in combinatorics
Santiago Barrera Acevedo, Padraig à Catháin, Heiko Dietrich +1
Centraliser algebras of monomial representations of finite groups may be constructed and studied using methods similar to those employed in the study of permutation groups. Guided…