Extend the foliated Plateau problem to higher dimensions

Extend the foliated Plateau problem from three-dimensional Riemannian balls, where minimal surfaces or elliptic-curvature discs foliate the unit tangent bundle, to higher-dimensional manifolds by constructing analogous foliations by minimal hypersurfaces or appropriate curvature hypersurfaces and developing a higher-dimensional replacement for the graph-theoretic analysis of Jacobi-equation zero sets.

Background

The paper’s geometric and microlocal arguments depend essentially on solving a foliated Plateau problem in dimension three. In that setting, the Gauss lifts of discs spanning a three-dimensional family of boundary circles foliate the unit tangent bundle, and the two-dimensional topology of the discs permits a graph-theoretic analysis of Jacobi fields’ zero sets.

For higher-dimensional analogues, the discs would be replaced by higher-dimensional balls and the boundary circles by hyperspheres. The authors identify the absence of a satisfactory higher-dimensional analogue of their zero-set argument as the principal obstruction.

References

Extending this foliation result to higher dimensions, in either setting, remains open.

— Foliated Plateau problems, surface Radon transforms, and boundary area rigidity in dimension three  (2609.29470 - Alvarez et al., 24 Sep 2026) in Section 1, Subsection “Comparison with earlier works,” and Section 1, Subsection “Perspectives,” Section “Higher dimensions” (label sssection:dimensions)