Results 31 to 40 of about 148,959 (291)

On the Classifying of the Tangent Sphere Bundle with Almost Contact B-Metric Structure

open access: yesپژوهش‌های ریاضی, 2021
One of the classical fundamental motifs in differential geometry of manifolds is the notion of the almost contact structure. As a counterpart of the almost contact metric structure, the notion of the almost contact B-metric structure has been an ...
Esmaeil Peyghan, Farshad Firuzi
doaj  

A Kähler Einstein structure on the tangent bundle of a space form

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2001
We obtain a Kähler Einstein structure on the tangent bundle of a Riemannian manifold of constant negative curvature. Moreover, the holomorphic sectional curvature of this Kähler Einstein structure is constant.
Vasile Oproiu
doaj   +1 more source

Higher Order Tangent Bundles [PDF]

open access: yesMediterranean Journal of Mathematics, 2016
The tangent bundle $T^kM$ of order $k$, of a smooth Banach manifold $M$ consists of all equivalent classes of curves that agree up to their accelerations of order $k$. For a Banach manifold $M$ and a natural number $k$ first we determine a smooth manifold structure on $T^kM$ which also offers a fiber bundle structure for $(π_k,T^kM,M)$.
openaire   +3 more sources

New hyper-Käahler structures on tangent bundles [PDF]

open access: yes, 2014
summary:Let $(M,g,J)$ be an almost Hermitian manifold, then the tangent bundle $TM$ carries a class of naturally defined almost hyper-Hermitian structures $(G,J_1,J_2,J_3)$.
Cao, Linfen, Qi, Xuerong, Li, Xingxiao
core   +1 more source

Horizontal lifts of projectable linear connection to semi-tangent bundle

open access: yes, 2021
The main aim of this article is to study the horizontal lifts of projectable linear connectionin the semi-tangent bundle tM. The properties of complete and horizontal lifts of projectable linear connection for semi-tangent bundle tM are also investigated.
Yildirim, Furkan   +2 more
core   +1 more source

DigiChrom: A Domain Ontology for Semantic Representation of Trivalent Chromium Platings and Its Large Language Model‐Based Alignment With Multiple Mid‐Level Ontologies

open access: yesAdvanced Engineering Materials, EarlyView.
Digitalizing electroplating requires both domain knowledge and interoperability. This work introduces PlatOn, a domain ontology for trivalent chromium plating and coating characterization, and a hybrid pipeline that aligns it to a mid‐level reference ontology by combining eight similarity metrics with language model reasoning. Expert‐validated mappings
Janik Harter   +10 more
wiley   +1 more source

Natural Paracontact Magnetic Trajectories on Unit Tangent Bundles

open access: yesAxioms, 2020
In this paper, we study natural paracontact magnetic trajectories in the unit tangent bundle, i.e., those that are associated to g-natural paracontact metric structures.
Mohamed Tahar Kadaoui Abbassi   +1 more
doaj   +1 more source

Discrepancies Between Micro Versus Macroscale Viscoelastic Properties in a Microplastic‐Tissue Composite Model

open access: yesAdvanced Engineering Materials, EarlyView.
This study explores the discrepancies between bulk mechanics and spatial mapping in a tissue‐mimetic hydrogel model. Microplastic particles create localized stiff mechanical microenvironments that are detectable by cellular‐scale nanoindentation but leave bulk properties unchanged as measured by rheology.
Ahron T. Verschleisser   +3 more
wiley   +1 more source

On the restrictions of the tangent bundle of the Grassmannians [PDF]

open access: yesPacific Journal of Mathematics, 1992
Let \(X\) be a projective variety and \(Q\) a vector bundle on \(X\); let \(q\) be a surjection \[ q:\bigoplus^ m{\mathcal O}_ X\to Q\to 0 \] and put \(S=\text{Ker} q\). The author studies the deformations of \(S\) obtained by moving \(q\) in the space \(A(*,Q)\) of surjections \(\bigoplus^ m{\mathcal O}_ X\to Q\). Under some cohomological assumptions \
openaire   +3 more sources

The cohomology of the elliptic tangent bundle [PDF]

open access: yes, 2021
In this note we compute the cohomology of the elliptic tangent bundle, a Lie algebroid introduced in Cavalcanti and Gualtieri (2018), Cavalcanti et al.
Witte, Aldo   +2 more
core   +1 more source

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