We study the robustness of strong stability of the homogeneous difference equation via the concept of strong stability radii: complex, real and positive radii in this paper. We also show that in the case of positive systems, these radii coincide. Finally, a simple example is given.
The Anh Bui. Dang Xuan Thanh Duong. "The Robustness of Strong Stability of Positive Homogeneous Difference Equations." J. Appl. Math. 2008 1 - 12, 2008. https://doi.org/10.1155/2008/124269