# Journal of Operator Theory

Volume 73, Issue 2, Spring 2015 pp. 315-332.

A generalization of Toeplitz operators on the Bergman space

**Authors**:
Daniel Suarez

**Author institution:**Depto. de Matematica, Fac. de Cs. Exactas y Naturales, Univ. de Buenos Aires,
Pab. I, Ciudad Universitaria, (1048) Nunez, Capital Federal, Argentina

**Summary: **If $\mu$ is a finite measure on the unit disc and $k\geqslant 0$ is an integer, we study a generalization
derived from Engli\v{s}'s work, $T_\mu^{(k)}$, of the traditional Toeplitz operators on the Bergman space $\berg$,
which are the case $k=0$. Among other things, we prove that when $\mu\geqslant 0$, these operators are bounded
if and only if $\mu$ is a Carleson measure, they are compact if and only if $\mu$ is a vanishing Carleson measure,
and we obtain some estimates for their norms.
Also, we use these operators to characterize the closure of the image of the Berezin transform applied
to the whole operator algebra.

**DOI: **http://dx.doi.org/10.7900/jot.2013nov28.2023

**Keywords: **Bergman space, Toeplitz operators, Berezin transform

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