Partial dynamic symmetries of IBA-2 hamiltonians in the Uπ+ν(5) limit

A. Giannatiempo et al. [1] found by numerical diagonalization very simple regularities in spectra of the Majorana operator in the U(5) limit with good F-spin of IBA-2. These regularities are generalized and derived here in the framework of dynamic symmetries of IBA-2 Hamiltonians in the Uπ+ν(5) limit.