The ground state construction of the two-dimensional Hubbard model on   the honeycomb lattice
  In these lectures I consider the half-filled two-dimensional (2D) Hubbard model on the honeycomb lattice and I review the rigorous construction of its ground state properties by making use of constructive fermionic Renormalization Group methods. 
Alessandro Giuliani
math-ph cond-mat.stat-mech cond-mat.str-el math.MP