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In this paper the margin of stability for a 2-D discrete system is considered. The definition of the margin of stability for the 1-D case is extended to the 2-D case in terms of analytic regions of rational functions in two variables. The relationship between the newly defined stability margin and the impulse response is established. A method to compute the stability margin is presented and illustrated with some examples.
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Agathoklis et al. (1982) studied this question.
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