نتایج جستجو برای: cr submanifolds

تعداد نتایج: 49010  

2004
BANG-YEN CHEN

It was conjectured in 1 II] (also in [2]) that mixed foliate CR-submanifolds in a complex hyperbolic space are either complex submanffolds or totally real submanifolds. In this paper we give an affirmative solution to this conjecture.

Journal: :Filomat 2022

In this paper, we study warped products of contact skew-CR submanifolds, called skew CR-warped products. We establish a lower bound relationship between the squared norm second fundamental form and warping function. The equality case inequality is investigated some special cases derived are given. Furthermore, provide non-trivial examples such submanifolds.

Journal: :Annales de la faculté des sciences de Toulouse Mathématiques 1981

Journal: :bulletin of the iranian mathematical society 0
m. a. khan ‎department of mathematics, ‎university of tabuk‎, ‎kingdom of saudi arabia. f. r. al-solamy ‎department of mathematics, ‎king abdulaziz university, ‎p.o‎. ‎box 80015‎, ‎jeddah 21589‎, ‎kingdom of saudi arabia.

in this paper we consider contact cr-warped product submanifolds of the type $m = n_ttimes_f n_perp$, of a nearly kenmotsu generalized sasakian space form $bar m(f_1‎, ‎f_2‎, ‎f_3)$ and by use of hopf's lemma we show that $m$ is simply contact cr-product under certain condition‎. ‎finally‎, ‎we establish a sharp inequality for squared norm of the second fundamental form and equality case i...

2009
Viqar Azam Khan Khalid Ali Khan

Warped product manifolds provide excellent setting to model space-time near black holes or bodies with large gravitational force (cf. [1], [2], [14]). Recently, results are published exploring the existence (or non-existence) of warped product submanifolds in Kaehlerian and contact settings (cf. [6], [17], [20]). To continue the sequel, we have considered warped product submanifolds of nearly K...

Journal: :Pacific Journal of Mathematics 1998

2002
VITTORIO MANGIONE

The Riemannian submersions of a CR-hypersurface M of a Kaehler-Einstein man-ifold˜M are studied. If M is an extrinsic CR-hypersurface of˜M, then it is shown that the base space of the submersion is also a Kaehler-Einstein manifold. 1. Introduction. The study of the Riemannian submersions π : M → B was initiated by O'Neill [14] and Gray [9]. This theory was very much developed in the last thirty...

In this paper we consider contact CR-warped product submanifolds of the type $M = N_Ttimes_f N_perp$, of a nearly Kenmotsu generalized Sasakian space form $bar M(f_1‎, ‎f_2‎, ‎f_3)$ and by use of Hopf's Lemma we show that $M$ is simply contact CR-product under certain condition‎. ‎Finally‎, ‎we establish a sharp inequality for squared norm of the second fundamental form and equality case is dis...

2006
Reem Al-Ghefari Mohammed Hasan Shahid Falleh R. Al-Solamy

In this paper, we discuss submersion of CR-submanifolds of locally conformal Kaehler manifold. We prove that if π : M −→ B◦ is a submersion of CR-submanifold M of a locally conformal Kaehler manifoldM onto an almost Hermitian manifold B◦, then B◦ is a locally conformal Kaehler manifold. Furthermore, we discuss totally umbilical CR-submanifold and cohomology of CR-submanifold of locally conforma...

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