Published Paper
Inserted: 12 oct 2025
Last Updated: 18 feb 2026
Journal: La Matematica
Volume: 5
Number: 6
Year: 2025
Doi: 10.1007/s44007-025-00176-8
Abstract:
This survey synthesizes the current state of the art on the regularity theory for solutions to the optimal partition problem. Namely, we consider non-negative, vector-valued Sobolev functions whose components have mutually disjoint support, and which are either local minimizers of the Dirichlet energy or, more generally, critical points satisfying a system of variational inequalities. This is particularly meaningful as the problem has emerged on several occasions and in diverse contexts: our aim is then to provide a coherent point of view and an up-to-date account of the progress concerning regularity of the solutions and their free boundaries, both in the interior and up to a fixed boundary.
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