17 citations · 75 across the 9 of their papers we have counts for
9 papers
Covariance and Time Regained in Canonical General Relativity
Ioannis Kouletsis
Canonical vacuum gravity is expressed in generally-covariant form in order that spacetime diffeomorphisms be represented within its equal-time phase space. In accordance with the p…
Gauge-invariant Hamiltonian dynamics of cylindrical gravitational waves
Ioannis Kouletsis, Petr Hajicek, Jiri Bicak
The model of cylindrical gravitational waves is employed to work out and check a recent proposal in Ref. [11] how a diffeomorphism-invariant Hamiltonian dynamics is to be construct…
Pair of null gravitating shells III. Algebra of Dirac's observables
I. Kouletsis, P. Hajicek
The study of the two-shell system started in ``Pair of null gravitating shells I and II'' (gr-qc/0112060--061) is continued. The pull back of the Liouville form to the constraint s…
Pair of null gravitating shells II. Canonical theory and embedding variables
P. Hajicek, I. Kouletsis
The study of the two shell system started in our first paper ``Pair of null gravitating shells I'' (gr-qc/0112060) is continued. An action functional for a single shell due to Louk…
Pair of null gravitating shells I. Space of solutions and its symmetries
P. Hajicek, I. Kouletsis
The dynamical system constituted by two spherically symmetric thin shells and their own gravitational field is studied. The shells can be distinguished from each other, and they ca…
Diffeomorphisms as Symplectomorphisms in History Phase Space: Bosonic String Model
Ioannis Kouletsis, Karel. V. Kuchar
The structure of the history phase space of a covariant field system and its history group (in the sense of Isham and Linden) is analyzed on an example of a bosonic string…