M Hajja, MC Kang - Journal of Algebra, 1992 - core.ac.uk
(* I where(mii) I, i,,, n is an invertible nxn matrix with integer entries and where a,(a) EK\(O). If
a,(c)= 1 Vi, then CJ is called purely monomial. It is proved in [6, Theorem] that if G is any …