Some Identities of Permanents
Mathematics in Practice and Theory
In this paper the author proves some equalities about the permanent of matrices under some conditions. For example, he proves that per(AX)=per(A)per(X) for A≥0 and all X≥0 if and only if A has a zero column or zero row.
Zhang, Fuzhen, "Some Identities of Permanents" (1989). Mathematics Faculty Articles. 109.