Özet:
We consider linear perturbation systems of difference equations
y(n+1)=(A(n) + B(n))y(n), n 0, where A(n), B(n) are NxN periodic matrices with period T. The spectrum of a monodromy matrix of the system x(n+1)=A(n)x(n), n 0 belongs to the unit disk |l| < 1. We indicate conditions on a perturbation matrix B(n) for asymptotic stability of the zero solution to the perturbation system and prove continuity one numeric characteristic of the asymptotic stability from [1].