Figure 4From: Dynamics of an HIV model with cytotoxic T-lymphocyte memoryFigure 4(a) is the diagram of time series of y at \(a=0.31\) with initial value \((3,1,2,4)\). Figure 4(b) is a part of the phase diagram about x and y with the same initial values. Figure 4(c) is the phase diagram with different initial valuesBack to article page