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  1. The logic of time reversal.E. J. Post - 1979 - Foundations of Physics 9 (1-2):129-161.
    Active time reversal in the sense of “object reversal” and passive time reversal in the sense of a frame reversal of time are discussed separately and then together so as to bring out their dual nature. An understanding of that duality makes it unavoidable to contrast symmetry properties of matter with symmetry properties to be assigned to antimatter. Only frame reversal of time can “see” all conceivable active time reversals relevant to physical objects. Only frame reversal of time can be (...)
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  • Time asymmetries in classical and in nonclassical physics.E. J. Post - 1979 - Foundations of Physics 9 (11-12):831-863.
    A comparative study is made of the eigenvalue problems of electromagnetics and quantum mechanics, with special reference to the operations of spatial inversionP and time inversionT. Electromagnetics, which permits closer agreement with the dictates of relativity (when the latter is extended toP andT), exhibits characteristic differences with respect to quantum mechanics. An evaluation of these distinctions is presented against the backdrop of a choice between absolute scalar action and charge versus pseudoscalar action and charge.
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  • Comments on “Parity and time inversion symmetries of electromagnetic systems” by R. M. Kiehn.E. J. Post - 1979 - Foundations of Physics 9 (5-6):421-424.
    Previous statements concerning the reduction of possible parity and time reversal choices for electromagnetic quantities are amplified for the sake of clearer understanding.
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