On the Stability of Nonlinearly Interconnected Large Scale Systems

There has been considerable interest in recent years in the input-output stability of large-scale systems, mainly in the case of nonlinear sub-systems combined together at linear summing points (see, for example (1,6) ). However, there has also been some literature on nonlinearly interconnected sub-systems (e.g. (3)) where a geometric type of argument is employed......