2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/141728Over the finite field with two elements, we present a method for obtaining explicit expressions for the number of rank i matrices of the form A above B, where A is persymmetric (A matrix [a(i,j)] is persymmetric if a(i,j) = a(r,s) for i+j = r+s).46 pagesNumber Theory11T 23, 15 A 33text