We present a setup that enables to define in a concrete way a renormalization
flow for the FK-percolation models from statistical physics (that are closely
related to Ising and Potts models). In this setting that is applicable in any
dimension of space, one can interpret perturbations of the critical
(conjectural) scaling limits in terms of stationary distributions for rather
simple Markov processes on spaces of abstract discrete weighted graphs.Comment: 12 pages, to appear in the Jean-Michel Bismut 65th anniversary volum
