Canonical and symplectic analysis for three dimensional gravity without   dynamics
  In this paper a detailed Hamiltonian analysis of three-dimensional gravity without dynamics proposed by V. Hussain is performed. We report the complete structure of the constraints and the Dirac brackets are explicitly computed. In addition, the Faddeev-Jackiw symplectic approach is developed; we report the complete set of Faddeev-Jackiw constraints and the generalized brackets, then we show that the Dirac and the generalized Faddeev-Jackiw brackets coincide to each other. Finally, the similarities and advantages between Faddeev-Jackiw and Dirac's formalism are briefly discussed. 
Alberto Escalante (Puebla U., Inst. Fis.) and H. H. Osmart   Ochoa-Guti\'errez (Puebla U., Mexico)
hep-th math-ph math.MP