Integral functionals on nonseparable Banach spaces with applications

Authors:
  • JGJuan Guillermo Garrido
    Juan Guillermo Garrido
  • PPPedro Pérez-Aros
    Pedro Pérez-Aros
  • EVEmilio Vilches
    Emilio Vilches
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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.