Unique factor ordering in the continuum limit of LQC
  We show that the factor ordering ambiguities associated with the loop quantisation of the gravitational part of the cosmological Hamiltonian constraint, disappear at the level of Wheeler-DeWitt equation only for a particular choice of lattice refinement model, which coincides with constraints imposed from phenomenological and consistency arguments. 
William Nelson and Mairi Sakellariadou (KCL London)