We study here the delay problem studied in  and , originating from . The aim is to find the optimal harvesting of a renewable ressource whose growth follows a logistic function. Denoting the biomass of population and the harvesting effort, the optimal control problem is stated as
with the harvesting cost , the growth rates , the discount rate and market price , and the growth delay . Bocop can handle the delayed term without having to perform the classical Guinn transformation (), but for a fixed final time only. Therefore we perform a batch of optimizations for , and iterate the process for to find a better estimate of the optimal time. Batch optimizations indicate an optimal final time with an objective .
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 L. Goellmann, D. Kern, and H. Maurer. Optimal control problems with delays in state and control variables subject to mixed control-state constraints. Optimal Control Applications and Methods, 30(4):341–365, 2009.
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