A simple sufficient criterion for the stability of multidimensional digital filters
H.C. Reddy, P.K. Rajan, M.N.S. Swamy · Proceedings of the IEEE · 1982
In this paper a theorem concerning the absence of zeros of a multivariable polynomial in the closed unit polydisc of a multidimensional complex plane is presented. Using this theorem the stability of a large class of multidimensional digital filters can be tested almost by inspection.