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Article
Mathematics, Applied
Alexandra Gilsbach et al.
Summary: This article examines a Serrin-type overdetermined boundary value problem for the biharmonic operator, proving the existence of a solution on the unit ball and in an open and bounded domain for small perturbations of the overdetermining condition, with stability estimates established. The approach is inspired by recent results and applies relevant research findings.
JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS
(2022)
Article
Mathematics, Applied
Lorenzo Cavallina
Summary: This paper introduces a new method for finding nontrivial solutions to overdetermined problems with fixed and free boundaries by applying the implicit function theorem. The method's novelty lies in considering perturbations of different regularity levels on each boundary, allowing for the construction of solutions that would have been out of reach via simpler techniques. Additionally, the method improves the regularity gap between the free boundary and the given domain boundary, and can be used to construct solutions to specific problems near radially symmetric configurations.
NONLINEAR ANALYSIS-THEORY METHODS & APPLICATIONS
(2022)
Article
Mathematics, Applied
Nikola Kamburov et al.
Summary: Researchers have constructed a class of nontrivial bounded, real analytic domains bifurcating from annuli that satisfy a certain boundary value problem. They found that the condition is both sufficient and necessary, and proved that the constructed domains are self-Cheeger.
ANNALES DE L INSTITUT HENRI POINCARE-ANALYSE NON LINEAIRE
(2021)
Article
Mathematics, Applied
Alexandra Gilsbach et al.
Summary: In this study, we investigate Serrin's classical overdetermined problem under a perturbation of the Neumann boundary condition. The existence of a solution for a constant Neumann boundary condition is established when the underlying domain is a ball. By developing a new implicit function theorem and conducting a detailed analysis of the linearized operator, we prove the existence and local uniqueness of a domain admitting a solution to the perturbed overdetermined problem, while also establishing an optimal linear stability estimate for the shape of the domain.
CALCULUS OF VARIATIONS AND PARTIAL DIFFERENTIAL EQUATIONS
(2021)
Article
Mathematics, Applied
Antoine Henrot et al.
Summary: The study of Bernoulli's free boundary problem involves elliptic and hyperbolic solutions, with the former being stable and tractable, and the latter being unstable and less understood. By introducing a new implicit function theorem and solving non-local geometric flows, the existence of hyperbolic and elliptic solutions is addressed by clarifying the spectral structure of the linearized operator through harmonic analysis.
ARCHIVE FOR RATIONAL MECHANICS AND ANALYSIS
(2021)
Article
Automation & Control Systems
Lorenzo Cavallina et al.
ESAIM-CONTROL OPTIMISATION AND CALCULUS OF VARIATIONS
(2020)
Article
Mathematics, Applied
Lorenzo Cavallina
APPLICABLE ANALYSIS
(2019)
Article
Mathematics
Miguel Dominguez-Vazquez et al.
ADVANCES IN MATHEMATICS
(2019)
Article
Mathematics, Applied
Chiara Bianchini et al.
INTERFACES AND FREE BOUNDARIES
(2014)