Profiles of hydrogen abundance X(H) (upper panel) and angular velocity (lower panel) at various epochs during the first mass-transfer episode in the rotating model. The time after the onset of mass transfer corresponding to each line is reported in the plot. The x-axis is defined in such a way that the original WD surface (M = 0.75 M_⊙) coincides with the origin. Lines a to e correspond to the evolution before the onset of the H-flash; line f corresponds to the epoch when flash-driven convection sets in; line g corresponds to the epoch when flash-driven convection attains its maximum extension. Dots connected by the heavy dashed line mark the position of the H-burning shell.