4 papers
The Propus Construction for Symmetric Hadamard Matrices
Jennifer Seberry, N. A. Balonin
\textit{Propus} (which means twins) is a construction method for orthogonal matrices based on a variation of the Williamson array called the \textit{propus array} \[ \begin…
On Generalized Hadamard Matrices and Difference Matrices:
Bradley W. Brock, Robert Compton, Warwick de Launey +1
We give some very interesting matrices which are orthogonal over groups and, as far as we know, referenced, but in fact undocumented. This note is not intended to be published but…
Cretan(4t+1) Matrices
N. A. Balonin, Jennifer Seberry
A matrix, of order , is an orthogonal matrix whose elements have moduli . The only matrices previously published are for orders 5, 9, 13…
Two-level Cretan Matrices Constructed Theoretically and Computationally using SBIBD
N. A. Balonin, Jennifer Seberry
Cretan matrices are orthogonal matrices with elements . These may have application in forming some new materials. There is a search for Cretan matrices, especially with hig…