Results 21 to 30 of about 110 (98)

Slant and Semi-Slant Submanifolds in Metallic Riemannian Manifolds

Journal of Function Spaces, 2018
The aim of our paper is to focus on some properties of slant and semi-slant submanifolds of metallic Riemannian manifolds. We give some characterizations for submanifolds to be slant or semi-slant submanifolds in metallic or Golden Riemannian manifolds and we obtain integrability conditions for the distributions involved in the semi-slant submanifolds ...
Cristina E. Hretcanu, Adara M. Blaga
openaire   +4 more sources

Inequality for Ricci curvature of certain submanifolds in locally conformal almost cosymplectic manifolds

International Journal of Mathematics and Mathematical Sciences, 2005
We establish inequalities between the Ricci curvature and the squared mean curvature, and also between the k-Ricci curvature and the scalar curvature for a slant, semi-slant, and bi-slant submanifold in a locally conformal almost cosymplectic manifold ...
Dae Won Yoon
doaj   +1 more source

Conformal-twisted product semi-slant submanifolds in globally conformal Kaehler manifolds

Hacettepe Journal of Mathematics and Statistics, 2021
We introduce the notion of conformal-twisted product submanifolds of the form $_fM^{T}\times_{b}M^{\theta}$ and $_fM^{\theta}\times_{b}M^{T}$, where $M^T$ is a holomorphic submanifold and $M^\theta$ is a proper slant submanifold of $M$ in a globally conformal Kaehler manifold and $f$ and $b$ are conformal factor and twisting function, respectively. We
Sibel GERDAN AYDIN, Hakan Mete TAŞTAN
openaire   +4 more sources

Pointwise almost h-semi-slant submanifolds [PDF]

International Journal of Mathematics, 2015
We introduce the notions of pointwise almost h-slant submanifolds and pointwise almost h-semi-slant submanifolds as a generalization of slant submanifolds, pointwise slant submanifolds, semi-slant submanifolds, and pointwise semi-slant submanifolds.
openaire   +2 more sources

Warped Product Pointwise Semi Slant Submanifolds of Sasakian Space Forms and their Applications [PDF]

Advances in Mathematical Physics, 2020
In this study, we attain some existence characterizations for warped product pointwise semi slant submanifolds in the setting of Sasakian space forms. Moreover, we investigate the estimation for the squared norm of the second fundamental form and further discuss the case of equality.
Nadia Alluhaibi, Meraj Ali Khan
openaire   +2 more sources

A note on pointwise semi-slant submanifold of para-Cosymplectic manifolds

Filomat, 2022
This article covers the geometric study of pointwise slant and pointwise semi-slant submanifolds of a para-Cosymplectic manifold M? 2m+1 with the semi-Riemannian metric. We give an advanced definition of these type of submanifolds for the spacelike and timelike vector fields.
S Srivastava, M. Dhiman, K. Sood, A. Kumar, F. Mofarreh, A. Ali   +5 more
openaire   +1 more source

Semi-slant submanifolds in a locally conformal Kaehler space form

Hacettepe Journal of Mathematics and Statistics, 2023
In this paper, we consider semi-slant submanifolds in a locally conformal Kaehler manifold and a locally conformal Kaehler space form. We give inequalities for the length of the second fundamental form and the mean curvature and, using Gauss and Codazzi equations, we get many useful results in locally conformal Kaehler space form.
Vittoria BONANZINGA, Koji MATSUMOTO
openaire   +3 more sources

Screen Semi-Slant Lightlike Submanifolds of Indefinite Sasakian Manifolds [PDF]

Hokkaido Mathematical Journal, 2016
In this paper, we introduce the notion of screen semi-slant lightlike submanifolds of indefinite Sasakian manifolds giving characterization theorem with some non-trivial examples of such submanifolds. Integrability conditions of distributions D1, D2 and RadTM on screen semi-slant lightlike submanifolds of indefinite Sasakian manifolds have been ...
SHUKLA, S. S., YADAV, Akhilesh
openaire   +2 more sources

Surface subgroups for cocompact lattices of isometries of H2n$\mathbb {H}^{2n}$

Journal of Topology, Volume 19, Issue 3, September 2026.
Abstract We prove the existence of surface subgroups within any cocompact lattice Γ$\Gamma$ in SO(2n,1)$\mathrm{SO}(2n,1)$ for n⩾2$n\geqslant 2$. This result addresses the cases missing from the work of Hamenstädt in 2015, who constructed surface subgroups in cocompact lattices for all other rank‐1 simple Lie groups of noncompact type.
Jeremy Kahn, Zhenghao Rao
wiley   +1 more source

Non‐Bivariational Time‐Dependent Orbital‐Quasi‐Optimized Coupled‐Cluster Methods Family for Fermion‐Mixtures Dynamics

Journal of Computational Chemistry, Volume 47, Issue 22, August 15, 2026.
ABSTRACT Recently, [JCP 161, 114114 (2024)] successfully derived numerically stable and converging (to the time‐dependent complete active space self‐consistent‐field) time‐dependent orthogonal coupled cluster (CC) methods, namely, time‐dependent orbital optimized CC (TD‐ooCC) methods for fermion‐mixtures with arbitrary fermion kinds and numbers, via ...
Haifeng Lang, Takeshi Sato
wiley   +1 more source