Geodesic
A Characterization of a Sparse Blaschke Product
Canadian mathematical bulletin, Tome 32 (1989) no. 4, pp. 385-390

Voir la notice de l'article provenant de la source Cambridge University Press

We give a characterization of a sparse Blaschke product b in terms of the separation of support sets of its zeros in M(H∞ + C) and the structure of the nonanalytic points. We use this characterization to give a sufficient condition on an interpolating Blaschke product q to have the following property: there exists a non trivial Gleason part P on which q is nonzero and less than one.
DOI : 10.4153/CMB-1989-056-0
Mots-clés : 46J15, 46J20 
Guillory, Carroll. A Characterization of a Sparse Blaschke Product. Canadian mathematical bulletin, Tome 32 (1989) no. 4, pp. 385-390. doi: 10.4153/CMB-1989-056-0
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