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# Pierre François Verhulst

Pierre François Verhulst (October 28, 1804 - February 15, 1849, Brussels, Belgium) was a mathematician and a doctor in number theory from the University of Ghent in 1825. Verhulst published in 1838 the logistic demographic model:

$N'(t) = r N(t) \left(1 - \frac {N(t)}{K} \right)$

when N(t) represents number of individuals at time t, r the intrinsic growth rate and K number of individuals in equilibrium.