Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1992-05-29
Physics
High Energy Physics
High Energy Physics - Theory
8 pp., McGill 92-15
Scientific paper
Time does not obviously appear amongst the coordinates on the constrained phase space of general relativity in the Hamiltonian formulation. Recent work in finite-dimensional models claims that topological obstructions generically make the global definition of time impossible. It is shown here that a time coordinate can be globally defined on a constrained phase space by patching together local time coordinates, just as coordinates are defined on topologically non-trivial manifolds.
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