  Magnetic fingerprints on the spectra of an interacting electron with a
negatively charged ion in a parabolic quantum dot (QD), and of two interacting
electrons in such a dot, are investigated via a pseudoperturbative methodical
proposal. The effect of ion-electron and electron-electron interactions on the
spectra are studied. The effect of the symmetry of such problem is emphasized.
Compared to those obtained by Zhu et al. [6], via a series solution, the
results are found in excellent accord. Higher excited - states are also
reported.
