Resumen de Hyponormality of Toeplitz operators on the Bergman space of an annulus
Houcine Sadraoui, Mohammed Guediri
A bounded operator S on a Hilbert space is hyponormal if S∗S −SS∗ is positive. In this work we find necessary conditions for the hyponormality of the Toeplitz operator Tf+g on the Bergman space of the annulus {1/2 < |z| < 1}, where f and g are analytic and f satisfies a smoothness condition.
