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Generalized Hilbert Operators on Bergman and Dirichlet Spaces of Analytic Functions

Naik S., Rajbangshi K.

Bulletin of the Polish Academy of Sciences. Mathematics

2015

Vol. 63, no. 3

227--235

Let f be an analytic function on the unit disk D. We define a generalized Hilbert-type operator Ha, b by Ha, b (f)(z) = [WZÓR], where a and b are non-negative real numbers. In particular, for a=b=β, Ha, b becomes the generalized Hilbert operator Hβ, and β=0 gives the classical Hilbert operator H. In this article, we find conditions on a and b such that Ha, b is bounded on Dirichlet-type spaces Sp, 0 < p < 2, and on Bergman spaces Ap, 2 < p < ∞. Also we find an upper bound for the norm of the operator Ha, b. These generalize some results of E. Diamantopolous (2004) and S. Li (2009).