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B-splines of Blaschke product type

✍ Scribed by Qiuhui Chen; Tao Qian; Guangbin Ren; Yi Wang


Book ID
113512059
Publisher
Elsevier Science
Year
2011
Tongue
English
Weight
461 KB
Volume
62
Category
Article
ISSN
0898-1221

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πŸ“œ SIMILAR VOLUMES


Finite Blaschke products of contractions
✍ Hwa-Long Gau; Pei Yuan Wu πŸ“‚ Article πŸ“… 2003 πŸ› Elsevier Science 🌐 English βš– 128 KB

Let A be a contraction on Hilbert space H and Ο† a finite Blaschke product. In this paper, we consider the problem when the norm of Ο†(A) is equal to 1. We show that (1) Ο†(A) = 1 if and only if A k = 1, where k is the number of zeros of Ο† counting multiplicity, and (2) if H is finite-dimensional and A