9 papers
On the classical central charge
M. Blagojevic, M. Vasilic
In the canonical formulation of a classical field theory, symmetry properties are encoded in the Poisson bracket algebra, which may have a central term. Starting from this well und…
Conservation laws in the teleparallel theory with a positive cosmological constant
M. Blagojevic, M. Vasilic
We study the conservation laws in the teleparallel theory with a positive cosmological constant, an extension of the teleparallel theory possessing solutions with de Sitter asympto…
Real null coframes in general relativity and GPS type coordinates
M. Blagojevic, J. Garecki, F. W. Hehl +1
Based on work of Derrick, Coll, and Morales, we define a `symmetric' null coframe with {\it four real null covectors}. We show that this coframe is closely related to the GPS type…
Hamiltonian structure of the teleparallel formulation of GR
M. Blagojevic, I. A. Nikolic
We apply Dirac's Hamiltonian approach to study the canonical structure of the teleparallel form of general relativity without matter fields. It is shown, without any gauge fixing,…
2D induced gravity from canonically gauged WZNW system
M. Blagojevic, D. S. Popovic, B. Sazdovic
Starting from the Kac--Moody structure of the WZNW model for SL(2,R) and using the general canonical formalism, we formulate a gauge theory invariant under local SL(2,R) x SL(2,R)…
2D Induced Gravity as an Effective WZNW System
M. Blagojevic, B. Sazdovic
We introduced a dynamical system given by a difference of two simple SL(2,R) WZNW actions in 2D, and defined the related gauge theory in a consistent way. It is shown that gauge sy…