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Unformatted text preview: T the threshold for the dierential equation. Whenever the initial position y is less than this threshold the solution y ( t ) 0. Figure 1. Slope ield for y = r y (1 y/T )-0.5 0.5 1 1.5 2 2.5 3 3.5 4-1-0.5 0.5 1 1.5 2 We conclude the lecture to relating everything weve done so far with population dynamics. Say that we have a population of size P = P ( t ) at time t . We keep track of two properties: There is an environmental carrying capacity K . That is, if P > K then the population will decrease in size because the population has exceeded its resources. 1...
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- Spring '09