  We calculate frequencies of collective oscillations of two-component Fermi
gas that is kept on the repulsive branch of its energy spectrum. Not only is a
paramagnetic phase explored, but also a ferromagnetically separated one. Both
in-, and out-of-phase perturbations are investigated, showing contributions
from various gas excitations. Additionally, we compare results coming from both
time-dependent Hartree-Fock and density-functional approaches.
