On ${\mathbb{Z}}_t\times {\mathbb{Z}}_2^2$-cocyclic Hadamard matrices

Victor Alvarez, Felix Gudiel, Maria Belen Guemes

A characterization of ${\mathbb{Z}}_t\times {\mathbb{Z}}_2^2$-cocyclic Hadamard matrices is described, depending on the notions of {\em distributions}, {\em ingredients} and {\em rec…