Finite renormalizations in the Epstein Glaser framework and renormalization of the S-matrix of phi(4)-theory

A formula describing finite renormalizations is derived in the Epstein-Glas er formalism and an explicit calculation of finite counterterms in Phi (4)- theory is performed. The Zimmermann identities and the action principle for changes of parameters in the interaction are presented independent of the adiabatic limit.