R. Gambini et al., ON THE CONSISTENCY OF THE CONSTRAINT ALGEBRA IN SPIN NETWORK QUANTUM-GRAVITY, International journal of modern physics D, 7(1), 1998, pp. 97-109
We point out several features of the quantum Hamiltonian constraints r
ecently introduced by Thiemann for Euclidean gravity. In particular we
discuss the issue of the constraint algebra and of the quantum realiz
ation of the object q(ab)V(b), which is classically the Poisson Bracke
t of two Hamiltonians.