# 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