Quantum Theory in Pseudo-Hilbert Space. II

@article{Konisi1958QuantumTI,
  title={Quantum Theory in Pseudo-Hilbert Space. II},
  author={Gaku Konisi and Takesi Ogimoto},
  journal={Progress of Theoretical Physics},
  year={1958},
  volume={21},
  pages={727-730}
}
A method for treating the Hilbert space with an indefinite metric operator is given. Any transformation of state vectors and operators appearing in physics is generated by a "pseudo-unitary operator". For such transformations two kinds of transformation properties, "covariant" and "con­ travariant ", are considered, just like in the case of the Lorentz transformations in the Minkowski space. It is shown that the difficulty of the Lorentz non-invariance of Gupta's theory in the quantum… 
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