Ward-Takahashi identities for the colored Boulatov model
  Ward-Takahashi identities of the colored Boulatov model are derived using a generic unitary field transformation. In a specific instance, this generic transformation turns out to be a symmetry of the interaction so that particular classes of reduced Ward-Takahashi identities for that symmetry are consequently identified and interpreted. 
Joseph Ben Geloun
hep-th gr-qc math-ph math.MP