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arXiv · 2610.04380

Asymptotic analyis of an optimal control problem for a phase field tumor growth model with hyperbolic relaxation of the chemical potential

Pierluigi Colli·Elisabetta Rocca·Jürgen Sprekels
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Abstract

In this paper, we study the optimal control of a phase field tumor growth model of Cahn--Hilliard type with possibly singular potential in which the often assumed parabolic relaxation of the chemical potential is replaced by a hyperbolic one. We investigate the asymptotic behavior of the control problem as the relaxation parameter $\,α\,$ approaches zero. It is shown that the corresponding state and adjoint state variables of the relaxed problem converge in a suitable sense to their counterparts for the unrelaxed regime where $α=0$. Also, weak limits of optimal controls for the relaxed problem can be shown to be optimal controls for the unrelaxed case. Moreover, every fixed optimal control $\,u^*\,$ for the unrelaxed system turns out to be the limit of a family $\{u^*_α\}_{α>0}$ of minimizers of suitable optimal control problems for the relaxed systems, where the original cost functional is replaced by the so-called ``adapted'' cost functional. It is also shown that the variational inequalities satisfied by $u^*_α$, which constitute the first-order necessary optimality conditions of the relaxed problems with adapted cost functional, converge to the corresponding variational inequality fulfilled by $u^*$ for the unrelaxed problem with the original (nonadapted) cost functional.

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Pierluigi Colli, Elisabetta Rocca, Jürgen Sprekels. 2026-10-03. Asymptotic analyis of an optimal control problem for a phase field tumor growth model with hyperbolic relaxation of the chemical potential. https://arxiv.org/abs/2610.04380

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