局部共形Kaehler流形中的翘曲积半倾斜子流形II

Q3 Mathematics
Koji Matsumoto
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引用次数: 2

摘要

1994年N. Papaghiuc在厄米流形中引入了半倾斜子流形的概念,它是$CR$和倾斜子流形的推广,\cite{MR0353212}, \cite{MR760392}。特别地,他考虑了Kaehlerian流形中的子流形\cite{MR1328947}。然后,在2007年,V. a . Khan和M. a . Khan在一个近Kaehler流形中考虑了这个子流形,得到了有趣的结果,\cite{MR2364904}。本文研究了局部共形Kaehler流形中的半倾斜子流形,给出了两种分布(全纯分布和倾斜分布)可积的充分必要条件。此外,我们考虑了这些子流形的局部共形Kaehler空间形式。在最后一篇文章中,我们定义了几乎厄米流形中的$2$ -类翘曲积半倾斜子流形,并研究了局部共形Kaehler流形中的第一类子流形。利用高斯方程,我们得到了该子流形在局部共形Kaehler空间形式下的一些性质,\cite{MR2077697}, \cite{MR3728534}。在局部共形Kaehler空间中,考虑具有平行第二基本形式的同一子流形。利用Codazzi方程,我们部分确定了在\eqref{1.3}中定义的张量场$P$,见定理\ref{th4.1}。最后,我们证明了在局部共形空间形式的第一类翘曲积半斜子流形中,如果它通常是平坦的,那么形状算子$A$满足一些特殊方程,见定理\ref{th5.2}。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Warped product semi-slant submanifolds in locally conformal Kaehler manifolds II
In 1994 N.~Papaghiuc introduced the notion of semi-slant submanifold in a Hermitian manifold which is a generalization of $CR$- and slant-submanifolds, \cite{MR0353212}, \cite{MR760392}. In particular, he considered this submanifold in Kaehlerian manifolds, \cite{MR1328947}. Then, in 2007, V.~A.~Khan and M.~A.~Khan considered this submanifold in a nearly Kaehler manifold and obtained interesting results, \cite{MR2364904}. Recently, we considered semi-slant submanifolds in a locally conformal Kaehler manifold and we gave a necessary and sufficient conditions of the two distributions (holomorphic and slant) be integrable. Moreover, we considered these submanifolds in a locally conformal Kaehler space form. In the last paper, we defined $2$-kind warped product semi-slant submanifolds in almost hermitian manifolds and studied the first kind submanifold in a locally conformal Kaehler manifold. Using Gauss equation, we derived some properties of this submanifold in an locally conformal Kaehler space form, \cite{MR2077697}, \cite{MR3728534}. In this paper, we consider same submanifold with the parallel second fundamental form in a locally conformal Kaehler space form. Using Codazzi equation, we partially determine the tensor field $P$ which defined in~\eqref{1.3}, see Theorem~\ref{th4.1}. Finally, we show that, in the first type warped product semi-slant submanifold in a locally conformal space form, if it is normally flat, then the shape operators $A$ satisfy some special equations, see Theorem~\ref{th5.2}.
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来源期刊
Proceedings of the International Geometry Center
Proceedings of the International Geometry Center Mathematics-Geometry and Topology
CiteScore
1.00
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0.00%
发文量
14
审稿时长
3 weeks
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