  We investigate the internal rotation profile of the GW Vir (PG1159-type) star
PG 0122+200 by employing an asteroseismological model that closely reproduces
the observed periods of this star. We adopt a forward approach and two
inversion methods based on the rotational splitting of the pulsation
frequencies to explore the properties of the rotation of PG 0122+200. We found
evidence for differential rotation in this star.

Solar and Stellar Astrophysics