The zero module and invariant subspaces
Bostwick F. Wyman, Mahaveer Kumar Sain · 1980
The zero-module of a transfer function captures the idea of multivariable zero and is particularly successful in the study of inverse systems. Recent results on module-theoretic descriptions of invariant and controllability subspaces have also led to important insights into zeros. These two approaches can be unified in a comprehensive collection of isomorphisms.