The eigen values of the corresponding jacobian matrix of the linearized system (2) about E⁄ are, 1:536;0:3429;0:2175;0:10:
Since the eigen values are negative, the equilibrium E⁄ is locally asymptotically stable.
It can be seen from Fig. 1 that for any initial start, the solution curves tend to equilibrium point E⁄. Hence, we infer that the system (2) is nonlinearly stable about this equilibrium E⁄ for the values of above set of parameters.
In Figs. 2, 3, 6, and 7, the variation of number of infected and protected nodes have been plotted with time for values of inflow rates A and B of susceptibles and infectives nodes respectively. It is noted that as A or B increases, the number of infective nodes increases and correspondingly the protected nodes also increases (see Figs. 6 and 7).
Figs. 4 and 8 show the role of antivirus program l with time for infected and protected nodes respectively. It is noted that as l increases the number of infected nodes decreases but the number of protected nodes increases.
It is also found that if antivirus program does not work effectively or fail to work efficiently, the number of infected nodes increases rapidly (see Fig. 5).
The eigen values of the corresponding jacobian matrix of the linearized system (2) about E⁄ are, 1:536;0:3429;0:2175;0:10:Since the eigen values are negative, the equilibrium E⁄ is locally asymptotically stable.It can be seen from Fig. 1 that for any initial start, the solution curves tend to equilibrium point E⁄. Hence, we infer that the system (2) is nonlinearly stable about this equilibrium E⁄ for the values of above set of parameters.In Figs. 2, 3, 6, and 7, the variation of number of infected and protected nodes have been plotted with time for values of inflow rates A and B of susceptibles and infectives nodes respectively. It is noted that as A or B increases, the number of infective nodes increases and correspondingly the protected nodes also increases (see Figs. 6 and 7).Figs. 4 and 8 show the role of antivirus program l with time for infected and protected nodes respectively. It is noted that as l increases the number of infected nodes decreases but the number of protected nodes increases.It is also found that if antivirus program does not work effectively or fail to work efficiently, the number of infected nodes increases rapidly (see Fig. 5).
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