  We present the explicit expressions for the (regularized) terms in the
large-epsilon asymptotic series of in particular the self-energy operator
pertaining to arbitrary systems of interacting spin-s fermions in d spatial
dimensions and deduce a variety of exact results concerning the general
properties of this operator. We give especial attention to systems of spin-1/2
fermions in d=3 interacting through the Coulomb potential. [Short Abstract]
