2 papers
math.CO2018
On orthogonal matrices with zero diagonal
Robert F. Bailey, Robert Craigen
We consider real orthogonal matrices whose diagonal entries are zero and off-diagonal entries nonzero, which we refer to as . We show that there exist…
math.CO2011
Comment on revised version of "The Hadamard circulant conjecture"
Robert Craigen, Jonathan Jedwab
The revised version of the claim by Hurley, Hurley and Hurley to have proved the circulant Hadamard matrix conjecture is mistaken.