Two Positive solutions for four values of β
. Two positive roots for the equation f(T) = g(T), for four values of β1. In (a) we show both roots, while in (b), a zoom near lower values of β1. Legends of curves stand for: b1 = 0.01 (Table 2), b2 = 0.1, b3 = 1.0 and b4 = 10.0.