Symmetric Bush-type Hadamard matrices of order $4m^4$ exist for all odd $m$

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/73750Using reversible Hadamard difference sets, we construct symmetric Bush-type Hadamard matrices of order $4m^4$ for all odd integer $m$.Combinatorics05B10; 05B20Symmetric Bush-type Hadamard matrices of order $4m^4$ exist for all odd $m$text