Density of algebras generated by Toeplitz operators on Bergman spaces
In this paper it is shown that Toeplitz operators on Bergman space form a dense subset of the space of all bounded linear operators, in the strong operator topology, and that their norm closure contains all compact operators. Further, theC*-algebra generated by them does not contain all bounded operators, since all Toeplitz operators belong to the essential commutant of certain shift. The result holds in Bergman spacesA2(Ω) for a wide class of plane domains Ω⊂C, and in Fock spacesA2(CN),N≧1.