Abstract
In this paper, we study integral functionals defined on spaces of functions with values on general (non-separable) Banach spaces. We introduce a new class of integrands and multifunctions for which we obtain measurable selection results. Then, we provide an interchange formula between integration and infimum, which enables us to get explicit formulas for the conjugate and Clarke subdifferential of integral functionals. Applications to expected functionals from stochastic programming, optimality conditions for a calculus of variation problem and sweeping processes are given.
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J.G. Garrido and E. Vilches were supported by Centro de Modelamiento Matemático (CMM), ACE210010 and FB210005, BASAL funds for center of excellence from ANID-Chile. P. Pérez-Aros and E. Vilches were supported by ANID-Chile under grants Fondecyt regular N\(^{\circ }\) 1200283 and Fondecyt regular N\(^{\circ }\) 1220886.
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Garrido, J.G., Pérez-Aros, P. & Vilches, E. Integral Functionals on Nonseparable Banach Spaces With Applications. Appl Math Optim 87, 29 (2023). https://doi.org/10.1007/s00245-022-09942-4
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DOI: https://doi.org/10.1007/s00245-022-09942-4