71 citations · 275 across the 21 of their papers we have counts for
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A Note on the Eigenvalue Problem in the su(1,1)-Algebra
S. Nishiyama, C. Providencia, J. da Providencia +2
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 Gauss' hy…
On the Eigenvalue Problem of the su(1,1)-Algebra and the Coupling Scheme of Two su(1,1)-Spins
S. Nishiyama, C. Providencia, J da Providencia +2
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…
Nuclear phenomena derived from quark-gluon strings
Henrik Bohr, Constanca Providencia, Joao da Providencia
We propose a QCD based many-body model for the nucleus where the strong coupling regime is controlled by a three body string force and the weak coupling regime is dominated by a pa…