Academic Editor: M. A. Petersen
Copyright © 2009 Naohisa Otsuka and Haruo Hinata. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
We introduce the concept of generalized -pairs which is related to generalized -invariant subspaces and generalized -invariant subspaces for infinite-dimensional systems. As an application the parameter-insensitive disturbance-rejection problem with dynamic compensator is formulated and its solvability conditions are presented. Further, an illustrative example is also examined.