The renormalized $\phi^4_4$-trajectory by perturbation theory in a   running coupling using partial differential equations
  We compute the renormalized trajectory of $\phi^4_4$-theory by perturbation theory in a running coupling. We use an exact infinitesimal renormalization group. The expansion is put into a form which is manifestly independent of the scale parameter. 
Christian Wieczerkowski (University of Muenster)