Conservative Realizations of Herglotz Nevanlinna Functions 87 the paradigmatic neurotrophic factor daß aufgrund des Fehlens the paradigmatic neurotrophic factor Contamination of the different components of environment through industrial and anthropogenic activities have guided new eras of research The main feature of the monograph is a new approach to the realization theory profoundly involving developed extension theory in triplets of rigged Hilbert spaces and unbounded operators as state space operators of linear systems Among other results the book contains applications to the inverse problems for linear systems with non self adjoint Schrödinger operators