Orthogonality relations for bivariate Bernstein-Szeg\H{o} measures
  The orthogonality properties of certain subspaces associated with bivariate Bernstein-Szeg\H{o} measures are considered. It is shown that these spaces satisfy more orthogonality relations than expected from the relations that define them. The results are used to prove a Christoffel-Darboux like formula for these measures. 
Jeffrey S. Geronimo, Plamen Iliev, Greg Knese
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