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Cyclicity in Dirichlet-type spaces and extremal polynomials II: functions on the bidisk
We study Dirichlet-type spaces D α of analytic functions in the unit bidisk and their cyclic elements.These are the functions f for which there exists a sequence ( p n ) ∞ n=1 of polynomials in two variables such that p n f -1 α → 0 as n → …