From: rockbrentwood@gmail.com   
      
   The question is whether there is a "non-perturbative" perturbation   
   theory for quantum field theory. By "perturbation theory", I mean   
   something that is grounded in asymptotic free fields (as done with   
   the S-matrix formulation or with treatments, like those of Bogoliubov   
   or Epstein-Glaser) and operators constructed from them. By   
   "non-perturbative", I mean a formulation of any of these types,   
   robust enough to also include features or results of known   
   non-perturbative formulations of quantum field theory; without the   
   need to go outside of or beyond the asymptotic free field +   
   operators-made-from-free-fields framework.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)