The Operator Valued Autoregressive Filter Problem and the Suboptimal Nehari Problem in Two Variables
J. S. Geronimo H. J. Woerdeman
Abstract
Necessary and sufficient conditions are given for the solvability of the operator valued two-variable autoregressive filter problem. In addition, in the two variable suboptimal Nehari problem sufficient conditions are given for when a strictly contractive little Hankel has a strictly contractive symbol.
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