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gr-qc1992
Thawing the Frozen Formalism: The Difference Between Observables and What We Observe
Arlen Anderson
In a parametrized and constrained Hamiltonian system, an observable is an operator which commutes with all (first-class) constraints, including the super-Hamiltonian. The problem o…
hep-th1992
The Global Problem of Time
Arlen Anderson
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…