A generalisation of bent vectors for Butson Hadamard matrices

José Andrés Armario, Ronan Egan, Hadi Kharaghani +1

An $n\times n$ complex matrix $M$ with entries in the $k^{\text{th}}$ roots of unity which satisfies $M{M}^{\ast }=n{I}_n$ is called a Butson Hadamard matrix. While a matrix with…