n a given year by
      a given predator.
    </p>

    <p>
      The PREDATORS only die of starvation, but this happens very quickly.
      If unfed, a predator will tend to starve in about 1/10 of a year.
      On the other hand, the predator reproduction rate is dependent on
      eating prey, and the chances of this depend on the number of available prey.
    </p>

    <p>
      The resulting differential equations can be written:
      <pre>
        PREY(0) = 5000
        PRED(0) =  100

        d PREY