Finite Rank Bargmann-Toeplitz Operators with Non-Compactly Supported   Symbols
  Theorems about characterization of finite rank Toeplitz operators in Fock-Segal-Bargmann spaces, known previously only for symbols with compact support, are carried over to symbols without that restriction, however with a rather rapid decay at infinity. The proof is based upon a new version of the Stone-Weierstrass approximation theorem. 
Grigori Rozenblum
math.FA math.CV