Hypercausal Linear Operators
Alan Hopenwasser · SIAM Journal on Control and Optimization · 1984
Several different classes of hypercausal operators are useful in linear system theory. It is the purpose of this note to provide, for each pair of classes of hypercausal operators, necessary and sufficient conditions on the Hilbert resolution space to guarantee equality of the classes. In addition, the effect of similarity transforms on each class is discussed.