Intermediate Inflation or Late Time Acceleration?

Figure 1

The plot of 𝛤 against 𝑧 for Ω_𝑚0=0.18 shows that 𝛤>1 for 𝑧<0.7, and is nearly constant for 𝑧<0.55. Thus, the field starts tracking for 𝑧≤0.5.