Figure 1. Discretized characteristics in D T .
Figure 2. Error analysis.
Figure 3. (Left) Approximate lower solution after 20 iterations (u 20). (Right) The total population after 20 iterations (Q(u 20)).
Figure 4. Periodic factors for growth, death and birth.
Figure 5 (Left) Approximate lower solution after 20 iterations (u 20). (Right) The total population after 20 iterations (Q(u 20)).
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