Accepted Paper

Inserted: 5 jan 2026
Last Updated: 3 feb 2026

Journal: Atti Accad. Naz. Lincei - Rend. Lincei Mat. Appl.
Year: 2026

Abstract:

We introduce a notion of quasiconvexity for continuous functions $f$ defined on the vector bundle of linear maps between the tangent spaces of a smooth Riemannian manifold $(M,g)$ and $\mathbb{R}^m$, naturally generalizing the classical Euclidean definition. We prove that this condition characterizes the sequential lower semicontinuity of the associated integral functional \[ F(u, \Omega) = \int_{\Omega} f(du) \, d\mu \] with respect to the weak$^*$ topology of $W^{1,\infty}(\Omega, \mathbb{R}^m)$, for every bounded open subset $\Omega\subseteq M$.

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