The mathematical basis for deterministic quantum mechanics

@inproceedings{Hooft2006TheMB,
  title={The mathematical basis for deterministic quantum mechanics},
  author={Gerard 't Hooft},
  year={2006}
}
If there exists a classical, i.e. deterministic theory underlying quantum mechanics, an explanation must be found of the fact that the Hamiltonian, which is defined to be the operator that generates evolution in time, is bounded from below. The mechanism that can produce exactly such a constraint is identified in this paper. It is the fact that not all classical data are registered in the quantum description. Large sets of values of these data are assumed to be indistinguishable, forming… 

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