Changes of the disc mass M_disc (top), magnitude (middle), and mass accretion rate at R_in (bottom) during one outburst cycle. The horizontal red line at the Ṁ_accr(t) plot is the constant mass transfer rate , and the horizontal green line is for this model. The parameters of the model are α_h = 0.2, α_c = 0.05, M₁ = 1.0   M_⊙, Ṁ_tr = 6.0 × 10¹⁶      g/s, and  ⟨ R_d ⟩  = 1.2 × 10¹⁰      cm. The point number 1 on all three plots refers to the point where the mass accumulation in the disc starts, point 2 is where the mass depletion from the disc starts, and point 3 is the end of this cycle when the mass starts to accumulate in the disc again.