SUBNORMALITY AND COMPOSITION OPERATORS ON THE BERGMAN SPACE

Following the work of C. Cowen and T. Kriete on the Hardy space, we prove that under a regularity condition, all composition operators with a subnormal adjoint on A2(D) have linear fractional symbols of the form ...Moreover, we show that all composition operators on the Bergman space having these symbols have a subnormal adjoint, with larger range for the parameter r than found in the Hardy space case.