https://indico.math.cnrs.fr/event/17336/
On the minimality of x/|x| (October 15, 2026) · Service de gestion de conférences de Mathrice...
The map $u_*\colon\mathbb R^3\to\mathbb S^2$, $x\mapsto x/|x|$, is a local minimizer of the Dirichlet energy $\int |\nabla u|^2$ among $\mathbb S^2$-valued...
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