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Some new problems in spectral optimization

Giuseppe ButtazzoBozhidar Velichkov — 2014

Banach Center Publications

We present some new problems in spectral optimization. The first one consists in determining the best domain for the Dirichlet energy (or for the first eigenvalue) of the metric Laplacian, and we consider in particular Riemannian or Finsler manifolds, Carnot-Carathéodory spaces, Gaussian spaces. The second one deals with the optimal shape of a graph when the minimization cost is of spectral type. The third one is the optimization problem for a Schrödinger potential in suitable classes.

Shape optimization problems for metric graphs

Giuseppe ButtazzoBerardo RuffiniBozhidar Velichkov — 2014

ESAIM: Control, Optimisation and Calculus of Variations

): ∈ 𝒜, ℋ() = }, where ℋ ,,  }  ⊂ R . The cost functional ℰ() is the Dirichlet energy of defined through the Sobolev functions on vanishing on the points . We analyze the existence of a solution in both the families of connected sets and of metric graphs. At the end, several explicit examples are discussed.

Optimal potentials for Schrödinger operators

Giuseppe ButtazzoAugusto GerolinBerardo RuffiniBozhidar Velichkov — 2014

Journal de l’École polytechnique — Mathématiques

We consider the Schrödinger operator - Δ + V ( x ) on H 0 1 ( Ω ) , where Ω is a given domain of d . Our goal is to study some optimization problems where an optimal potential V 0 has to be determined in some suitable admissible classes and for some suitable optimization criteria, like the energy or the Dirichlet eigenvalues.

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