Combinatorics and physics : Mini-Workshop on Renormalization, December 15-16, 2006 : Conference on Combinatorics and Physics, March 19-23, 2007, Max-Planck-Institut für Mathematik, Bonn, Germany - Mini-Workshop on Renormalization; Conference on Combinatorics and Physics; Ebrahimi-Fard, Kurusch; Marcolli, Matilde; Suijlekom, Walter D. van; Max-Planck-Institut für Mathematik (American Mathematical Society, 2011)