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Gleason Parts and Closed Ideals in Douglas Algebras

Gleason Parts and Closed Ideals in Douglas Algebras Recently, the study of the structure of closed ideals in $$H^{\infty }$$ H ∞ whose zero sets are contained in G, the union set of non-trivial Gleason parts, has progressed remarkably. We generalize these results to closed ideals in Douglas algebras A. For non-zero functions $$f_1,f_2,\ldots ,f_n$$ f 1 , f 2 , … , f n in A, $$I=\sum ^n_{j=1}f_j A$$ I = ∑ j = 1 n f j A is an ideal (may not be closed) in A. We also show that if I is closed in A and its common zero set is contained in G, then $$I=b A$$ I = b A for a Carleson–Newman Blaschke product b. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Computational Methods and Function Theory Springer Journals

Gleason Parts and Closed Ideals in Douglas Algebras

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References (27)

Publisher
Springer Journals
Copyright
Copyright © 2015 by Springer-Verlag Berlin Heidelberg
Subject
Mathematics; Analysis; Computational Mathematics and Numerical Analysis; Functions of a Complex Variable
ISSN
1617-9447
eISSN
2195-3724
DOI
10.1007/s40315-015-0136-9
Publisher site
See Article on Publisher Site

Abstract

Recently, the study of the structure of closed ideals in $$H^{\infty }$$ H ∞ whose zero sets are contained in G, the union set of non-trivial Gleason parts, has progressed remarkably. We generalize these results to closed ideals in Douglas algebras A. For non-zero functions $$f_1,f_2,\ldots ,f_n$$ f 1 , f 2 , … , f n in A, $$I=\sum ^n_{j=1}f_j A$$ I = ∑ j = 1 n f j A is an ideal (may not be closed) in A. We also show that if I is closed in A and its common zero set is contained in G, then $$I=b A$$ I = b A for a Carleson–Newman Blaschke product b.

Journal

Computational Methods and Function TheorySpringer Journals

Published: Aug 4, 2015

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