Results 21 to 30 of about 2,825 (265)
R-Symmetries and Curvature Constraints in A-Twisted Heterotic Landau–Ginzburg Models
Particles, 2023 In this paper, we discuss various aspects of a class of A-twisted heterotic Landau–Ginzburg models on a Kähler variety X. We provide a classification of the R-symmetries in these models which allow the A-twist to be implemented, focusing on the case in ...
Richard S. Garavuso
doaj +1 more source
Poisson structures on tangent bundles
Differential Geometry and its Applications, 2003 The paper starts with an interpretation of the complete lift of a Poisson structure from a manifold M to its tangent bundle TM by means of the Schouten- Nijenhuis bracket of covariant symmetric tensor fields defined by the co- tangent Lie algebroid of M.
Mitric, Gabriel, Vaisman, Izu
openaire +3 more sources
Dirac Structures on Banach Lie Algebroids
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2014 In the original definition due to A. Weinstein and T. Courant a Dirac structure is a subbundle of the big tangent bundle T M ⊕ T* M that is equal to its ortho-complement with respect to the so-called neutral metric on the big tangent bundle.
Vulcu Vlad-Augustin
doaj +1 more source
On the Classifying of the Tangent Sphere Bundle with Almost Contact B-Metric Structure
پژوهشهای 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
Higher Order Tangent Bundles [PDF]
Mediterranean 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
A Kähler Einstein structure on the tangent bundle of a space form
International 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
On the restrictions of the tangent bundle of the Grassmannians [PDF]
Pacific 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
Advanced Engineering Materials, EarlyView.A two‐dimensional multiscale finite element analysis framework was established for the first‐generation MoSiBTiC alloy, and the mechanical and fracture‐related parameters of the constituent phases were calibrated through experiments and simulations. The framework provides a basis for analyzing crack propagation behavior in its complex microstructure ...
Junfeng Du +4 more
wiley +1 more source
Natural Paracontact Magnetic Trajectories on Unit Tangent Bundles
Axioms, 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
Advanced Engineering Materials, EarlyView.The present study investigates recycling of NiTi shape memory alloys via vacuum induction melting. An ingot was synthesized from elemental Ni and Ti and subjected to three subsequent remelting cycles. Remelting increases process durations and impurity levels and adversely affects microstructures and functional properties.
Sakia Sophia Noorzayee +7 more
wiley +1 more source