An Elliptic Optimal Control Problem and its Two Relaxations

Behrouz Emamizadeh (), Amin Farjudian () and Hayk Mikayelyan ()
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Behrouz Emamizadeh: The University of Nottingham Ningbo
Amin Farjudian: Halmstad University
Hayk Mikayelyan: The University of Nottingham Ningbo

Journal of Optimization Theory and Applications, 2017, vol. 172, issue 2, No 6, 455-465

Abstract: Abstract In this note, we consider a control theory problem involving a strictly convex energy functional, which is not Gâteaux differentiable. The functional came up in the study of a shape optimization problem, and here we focus on the minimization of this functional. We relax the problem in two different ways and show that the relaxed variants can be solved by applying some recent results on two-phase obstacle-like problems of free boundary type. We derive an important qualitative property of the solutions, i.e., we prove that the minimizers are three-valued, a result which significantly reduces the search space for the relevant numerical algorithms.

Keywords: Minimization; Free boundary; Optimality condition; Non-smooth analysis; 49J20; 35R35 (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1007/s10957-016-0983-1

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