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General Review of Cosmological Theories
1972
Symposium - International astronomical union
Quantum effects in the early stages of some cosmological models are considered. Interactions between particles can be expressed in terms of the Dirac delta function, and the implications of the existence of both positive and negative frequencies in the Fourier expansion of this function are discussed.
doi:10.1017/s0074180900006033
fatcat:6tfjimed3nedpnawag5gbpqyia