Abstract
The class of readout maps of the early state space literature and the class of operators which are both causal and anticausal are compared. The first class is a subset of the second and is shown by example to be a proper subset. A characterization of the smaller class in terms of causality structure is presented. We denote this characterization by the term completely memoryless.
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Coxson, P.G. A note on memoryless operators. Math. Systems Theory 16, 185–188 (1983). https://doi.org/10.1007/BF01744576
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DOI: https://doi.org/10.1007/BF01744576