Willmore-type variational problem for foliated hypersurfaces

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1. Verfasser: Rovenski, Vladimir
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Veröffentlicht: 2024
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author Rovenski, Vladimir
author_facet Rovenski, Vladimir
contents We study new Willmore-type variational problem for a hypersurface $M$ in $\mathbb{R}^{n+1}$ equipped with an $s$-dimensional foliation ${\cal F}$. Its general version is the Reilly-type functional $WF_{n,s}=\int_M F(σ^{\cal F}_1,\ldots,σ^{\cal F}_s)\,{\rm d}V$, where $σ^{\cal F}_i$ are elementary symmetric functions of the eigenvalues of the second fundamental form restricted on the leaves of $\cal F$. The first and second variations of such functionals are calculated, conformal invariance of some of $WF_{n,s}$ is also shown. The Euler-Lagrange equation for a critical hypersurface with a transversally harmonic (e.g., Riemannian) foliation $\cal F$ is found and examples with $s\le2$ and $s=n$ are considered. Critical hypersurfaces of revolution are found, and it is shown that they are a local minimum for special variations.
format Preprint
id arxiv_https___arxiv_org_abs_2402_17565
institution arXiv
publishDate 2024
record_format arxiv
spellingShingle Willmore-type variational problem for foliated hypersurfaces
Rovenski, Vladimir
Differential Geometry
53C12, 53C15, 53C42
We study new Willmore-type variational problem for a hypersurface $M$ in $\mathbb{R}^{n+1}$ equipped with an $s$-dimensional foliation ${\cal F}$. Its general version is the Reilly-type functional $WF_{n,s}=\int_M F(σ^{\cal F}_1,\ldots,σ^{\cal F}_s)\,{\rm d}V$, where $σ^{\cal F}_i$ are elementary symmetric functions of the eigenvalues of the second fundamental form restricted on the leaves of $\cal F$. The first and second variations of such functionals are calculated, conformal invariance of some of $WF_{n,s}$ is also shown. The Euler-Lagrange equation for a critical hypersurface with a transversally harmonic (e.g., Riemannian) foliation $\cal F$ is found and examples with $s\le2$ and $s=n$ are considered. Critical hypersurfaces of revolution are found, and it is shown that they are a local minimum for special variations.
title Willmore-type variational problem for foliated hypersurfaces
topic Differential Geometry
53C12, 53C15, 53C42
url https://arxiv.org/abs/2402.17565