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December, 2023 $\delta^{\sharp}(2,2)$-Ideal Centroaffine Hypersurfaces of Dimension 4
Handan Yıldırım, Luc Vrancken
Author Affiliations +
Taiwanese J. Math. 27(6): 1075-1104 (December, 2023). DOI: 10.11650/tjm/230706

Abstract

Ideal submanifolds have been studied from various aspects since Chen invented $\delta$-invariants in early 1990s (see [12] for a survey). In centroaffine differential geometry, Chen's invariants denoted by $\delta^{\sharp}$ are used to determine an optimal bound for the squared norm of the Tchebychev vector field of a hypersurface. We point out that a hypersurface attaining this bound is said to be an ideal centroaffine hypersurface. In this paper, we deal with $\delta^{\sharp}(2,2)$-ideal centroaffine hypersurfaces in $\mathbb{R}^{5}$ and in particularly, we focus on $4$-dimensional $\delta^{\sharp}(2,2)$-ideal centroaffine hypersurfaces of type $1$.

Funding Statement

This work was supported by the Scientific Research Projects Coordination Unit of Istanbul University with the project numbered 33525.

Citation

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Handan Yıldırım. Luc Vrancken. "$\delta^{\sharp}(2,2)$-Ideal Centroaffine Hypersurfaces of Dimension 4." Taiwanese J. Math. 27 (6) 1075 - 1104, December, 2023. https://doi.org/10.11650/tjm/230706

Information

Received: 16 March 2023; Revised: 20 July 2023; Accepted: 25 July 2023; Published: December, 2023
First available in Project Euclid: 20 November 2023

MathSciNet: MR4669763
Digital Object Identifier: 10.11650/tjm/230706

Subjects:
Primary: 53A15 , 53C42

Keywords: $\delta^{\sharp}$-invariants , $\delta^{\sharp}(2,2)$-ideal , centroaffine differential geometry , centroaffine hypersurfaces of dimension $4$ , type $1$

Rights: Copyright © 2023 The Mathematical Society of the Republic of China

Vol.27 • No. 6 • December, 2023
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