# A Hankel Matrix Acting on Spaces of Analytic Functions

A Hankel Matrix Acting on Spaces of Analytic Functions If $$\mu$$ μ is a positive Borel measure on the interval [0, 1) we let $$\mathcal H_\mu$$ H μ be the Hankel matrix $$\mathcal H_\mu =(\mu _{n, k})_{n,k\ge 0}$$ H μ = ( μ n , k ) n , k ≥ 0 with entries $$\mu _{n, k}=\mu _{n+k}$$ μ n , k = μ n + k , where, for $$n\,=\,0, 1, 2, \dots$$ n = 0 , 1 , 2 , ⋯ , $$\mu _n$$ μ n denotes the moment of order n of $$\mu$$ μ . This matrix induces formally the operator \begin{aligned} \mathcal {H}_\mu (f)(z)= \sum _{n=0}^{\infty }\left( \sum _{k=0}^{\infty } \mu _{n,k}{a_k}\right) z^n \end{aligned} H μ ( f ) ( z ) = ∑ n = 0 ∞ ∑ k = 0 ∞ μ n , k a k z n on the space of all analytic functions $$f(z)=\sum _{k=0}^\infty a_kz^k$$ f ( z ) = ∑ k = 0 ∞ a k z k , in the unit disc $${\mathbb D}$$ D . This is a natural generalization of the classical Hilbert operator. In this paper we improve the results obtained in some recent papers concerning the action of the operators $$\mathcal {H}_\mu$$ H μ on Hardy spaces and on Möbius invariant spaces. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Integral Equations and Operator Theory Springer Journals

# A Hankel Matrix Acting on Spaces of Analytic Functions

, Volume 89 (4) – Nov 2, 2017
14 pages

/lp/springer_journal/a-hankel-matrix-acting-on-spaces-of-analytic-functions-k4ZjomK5AA
Publisher
Springer Journals
Subject
Mathematics; Analysis
ISSN
0378-620X
eISSN
1420-8989
D.O.I.
10.1007/s00020-017-2409-3
Publisher site
See Article on Publisher Site

### Abstract

If $$\mu$$ μ is a positive Borel measure on the interval [0, 1) we let $$\mathcal H_\mu$$ H μ be the Hankel matrix $$\mathcal H_\mu =(\mu _{n, k})_{n,k\ge 0}$$ H μ = ( μ n , k ) n , k ≥ 0 with entries $$\mu _{n, k}=\mu _{n+k}$$ μ n , k = μ n + k , where, for $$n\,=\,0, 1, 2, \dots$$ n = 0 , 1 , 2 , ⋯ , $$\mu _n$$ μ n denotes the moment of order n of $$\mu$$ μ . This matrix induces formally the operator \begin{aligned} \mathcal {H}_\mu (f)(z)= \sum _{n=0}^{\infty }\left( \sum _{k=0}^{\infty } \mu _{n,k}{a_k}\right) z^n \end{aligned} H μ ( f ) ( z ) = ∑ n = 0 ∞ ∑ k = 0 ∞ μ n , k a k z n on the space of all analytic functions $$f(z)=\sum _{k=0}^\infty a_kz^k$$ f ( z ) = ∑ k = 0 ∞ a k z k , in the unit disc $${\mathbb D}$$ D . This is a natural generalization of the classical Hilbert operator. In this paper we improve the results obtained in some recent papers concerning the action of the operators $$\mathcal {H}_\mu$$ H μ on Hardy spaces and on Möbius invariant spaces.

### Journal

Integral Equations and Operator TheorySpringer Journals

Published: Nov 2, 2017

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