Parameter

Definitions

${\pi }_{x_1}$

Source of naive CD4+ T cells

${\pi }_{x_4}$

Source of naive CD8+ T cells

$\beta$

Infection rate of naive CD4+ T cells by HIV-1

$d_{x_1}$

Death rate of naive CD4+ T cells

$d_{x_2}$

Death rate of activated CD4+ T cells

$d_{x_3}$

Death rate of productively infected CD4+ T cells

$d_{x_4}$

Death rate of naive CD8+ T cells

$d_{x_5}$

Death rate of activated CD8+ T cells

$d_{x_6}$

Death rate of HIV-1 virion

${\alpha }_1$

Activation rate of naive CD4+ T cells

${\alpha }_2$

Activation rate of naive CD8+ T cells

$N_{x_6}$

Maximum carrying capacity of infected CD4+ T cells

$\rho$

Killing of infected CD4+ T cells by CD8+ T effector cells