The algebraic theory of linear, time-invariant, multiinput-multioutput (MIMO) feedback systems has developed rapidly during the past decade. The factorization approach is simple and elegant; it is suitable for both continuous-time and discrete-time lumped-parameter system models, and many of its results apply directly to distributed-parameter systems. This volume streamlines the algebreaic approach to the analysis and synthesis of linear time-invariant MIMO feedback systems.