There are recent results concerning the boundedness and also unboundedness of Bergman projections on weighted spaces unit disc in special cases rapidly decreasing weights, i.e. “large” spaces. The aim our paper is to show that largely exceptional: general unbounded. In addition we give a new, more functional analytic proof for known central case which enables us transfer harmonic

We characterize the space of multipliers between certain weighted Besov spaces of analytic functions. This extend and give a new proof of a result of Wojtaszczyk about multipliers between Bergman spaces. Introduction. P. Wojtaszczyk [W], using certain factorization theorems due to Maurey and Grothendieck, proved the following results: Let α > 0, 0 < p ≤ 2 ≤ q < ∞ and 1r = 1 p − 1q . (0.1) (Bq, ...