Evolution of the semimajor axis (top), eccentricity (middle), mass ratio q, and angle ℰ (bottom) as a function of time during mass transfer. The dashed black and gray lines correspond to the emt and δ-function (f_don = 1.0) models, respectively. The orange, blue and red lines correspond to the GeMT model, for subsynchronous (f_don = 0.0), synchronous (f_don = 1.0) and supersynchronous donors (f_don = 2.0), respectively. In the bottom panel, the two horizontal dotted lines indicate ℰ₀ = π and q = 1.