After recapitulating the eigenvalue problem of the su(1, 1)-algebra in the conventional form, the same problem is treated in an unconventional form, in which the eigenvalue is pure imaginary.â€¦ (More)

It is shown that a variational approach with fermionic squeezed states to manyfermion systems such as pairing model is one of useful methods beyond the usual Hartree-Fock-Bogoliubov approximation. Aâ€¦ (More)

Pulmonary tumor thrombotic microangiopathy (PTTM) is a high-mortality disease that is difficult to diagnose clinically. Our patient was an 80-year-old woman who came to us due to symptoms ofâ€¦ (More)

As natural extensions of the boson realizations of the su(2)and the su(1, 1)algebra, the so(4)and the so(3, 1)-algebras are presented in the form of boson realizations with four kinds of bosonâ€¦ (More)

We present the exact solutions to the equations of the lowest energy states of the colored and color-symmetric sectors of the Bonn quark model, which is SU(3) symmetric and is defined in terms of anâ€¦ (More)

Normalization constant in the eigenstate appearing in the eigenvalue problem of the su(1, 1)-algebra is discussed. This normalization constant is expressed in terms of the Gaussâ€™ hypergeometricâ€¦ (More)

We develop a general theory to describe a superconducting Fermion system with large quantum fluctuations. The theory is a direct extension of the resonating Hartree-Fock (HF) theory to theâ€¦ (More)

The maximally-decoupled method has been considered as a theory to apply an basic idea of an integrability condition to certain multiple parametrized symmetries. The method is regarded as aâ€¦ (More)