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Pré-Publication, Document De Travail Année : 2022

Time Consistency for Multistage Stochastic Optimization Problems under Constraints in Expectation

Résumé

We consider sequences-indexed by time (discrete stages)-of families of multistage stochastic optimization problems. At each time, the optimization problems in a family are parameterized by some quantities (initial states, constraint levels.. .). In this framework, we introduce an adapted notion of time consistent optimal solutions, that is, solutions that remain optimal after truncation of the past and that are optimal for any values of the parameters. We link this time consistency notion with the concept of state variable in Markov Decision Processes for a class of multistage stochastic optimization problems incorporating state constraints at the final time, either formulated in expectation or in probability. For such problems, when the primitive noise random process is stagewise independent and takes a finite number of values, we show that time consistent solutions can be obtained by considering a finite dimensional state variable. We illustrate our results on a simple dam management problem.
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hal-03761310 , version 1 (26-08-2022)

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Pierre Carpentier, Jean-Philippe Chancelier, Michel de Lara. Time Consistency for Multistage Stochastic Optimization Problems under Constraints in Expectation. 2022. ⟨hal-03761310⟩
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