Below is the ascii version of the abstract for 96-450. The html version should be ready soon.

Dick R.
Complex Structures in Quantum Field Theory
(29K, LaTeX)

ABSTRACT.  We give a short review of the appearance and use of complex structures
in several places in quantum field theory and point out, that Ward identities
imply a notion of reproducing kernel in the set of classical solutions of
any quantum field theory.