@conference {
	title = {On Canonical Realizations with Unbounded Infinitesimal Generators},
	author = {Baras, John S.},
	year = {1973},
	month = {10/1973},
	abstract = {In this paper, we study canonical (controllable and observable) realiza-tions for infinite dimensional linear systems. In these realizations the infinitesimal state transition operator is unbounded but the generator of a Co -semigroup in a Hilbert space. We present ways to reduce a realization to a canonical one. We also study the relation between the analytic proper-ties of a transfer function and the spectral properties of the infinitesimal generators in its realizations. Finally, we describe a class of transfer functions which can be realized by a system with an infinitesimal generator having spectral properties closely related to the singularities of the trans-fer functions.},
	address = {Illinois},
	booktitle = {11th Annual Allerton Conference on Circuit and System Theory},
	pages = {pp. 1-10}
}
