Hypersurfaces of any homogeneous $\mathbb{C}P^3$

Fuente: arXiv
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Main Author: Liefsoens, Michaël
Format: Preprint
Published: 2025
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author Liefsoens, Michaël
author_facet Liefsoens, Michaël
contents Hypersurfaces are studied and classified under multiple additional assumptions in any Riemannian homogeneous space $(\mathbb{C}P^3, g_a)$, including nearly Kähler $\mathbb{C}P^3$. Notably, all extrinsically homogeneous hypersurfaces are classified in all these spaces, with an explicit family of examples. Moreover, for nearly Kähler $\mathbb{C}P^3$, all Hopf hypersurfaces are classified. Finally, Codazzi-like hypersurfaces (and in particular parallel and totally geodesic hypersurfaces), totally umbilical hypersurfaces and constant sectional curvature hypersurfaces are proven to not exist in any homogeneous $\mathbb{C}P^3$.
format Preprint
id arxiv_https___arxiv_org_abs_2503_08871
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Hypersurfaces of any homogeneous $\mathbb{C}P^3$
Liefsoens, Michaël
Differential Geometry
Hypersurfaces are studied and classified under multiple additional assumptions in any Riemannian homogeneous space $(\mathbb{C}P^3, g_a)$, including nearly Kähler $\mathbb{C}P^3$. Notably, all extrinsically homogeneous hypersurfaces are classified in all these spaces, with an explicit family of examples. Moreover, for nearly Kähler $\mathbb{C}P^3$, all Hopf hypersurfaces are classified. Finally, Codazzi-like hypersurfaces (and in particular parallel and totally geodesic hypersurfaces), totally umbilical hypersurfaces and constant sectional curvature hypersurfaces are proven to not exist in any homogeneous $\mathbb{C}P^3$.
title Hypersurfaces of any homogeneous $\mathbb{C}P^3$
topic Differential Geometry
url https://arxiv.org/abs/2503.08871