Numerical Analysis for a Fractional Differential Time-Delay Model of HIV Infection of CD4⁺ T-Cell Proliferation under Antiretroviral Therapy

Figure 4

In (a)–(d), 𝑛_rt=0.5, 𝑛_𝑝=0.25, 𝛼=0.9, 𝜏=0, 𝐶=10, and 𝑟=0.01.

(a)

(b)

(c)

(d)