Results 11 to 20 of about 1,021 (98)
Non-Existence of Real Hypersurfaces with Parallel Structure Jacobi Operator in S6(1)
Mathematics, 2022 It is well known that the sphere S6(1) admits an almost complex structure J which is nearly Kähler. If M is a hypersurface of an almost Hermitian manifold with a unit normal vector field N, the tangent vector field ξ=−JN is said to be characteristic or ...
Miroslava Antić, Djordje Kocić
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Geometry of concircular curvature tensor of Kahler manifolds
Tikrit Journal of Pure Science, 2020 The study deals with the necessary condition where a nearly Kahler manifold of flat concircular tensor has been found. And the relationship between these invariants and additional properties of symmetry concircular tensor, as well as geometrical meaning
Rawah A. Zaben, Rana H. Jasim
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Deformation theory of nearly K\"ahler manifolds [PDF]
, 2016 Nearly K\"ahler manifolds are the Riemannian 6-manifolds admitting real Killing spinors. Equivalently, the Riemannian cone over a nearly K\"ahler manifold has holonomy contained in G2.
Foscolo, Lorenzo
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Instantons on conical half-flat 6-manifolds [PDF]
, 2015 We present a general procedure to construct 6-dimensional manifolds with SU(3)-structure from SU(2)-structure 5-manifolds. We thereby obtain half-flat cylinders and sine-cones over 5-manifolds with Sasaki-Einstein SU(2)-structure.
Bunk, Severin +3 more
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Consistent truncation with dilatino condensation on nearly Kähler and Calabi-Yau manifolds
Journal of High Energy Physics, 2019 We construct a consistent four-scalar truncation of ten-dimensional IIA supergravity on nearly Kähler spaces in the presence of dilatino condensates. The truncation is universal, i.e.
Robin Terrisse, Dimitrios Tsimpis
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GENERELIZED CONHARMONIC CURVATURE TENSOR OF NEARLY KAHLER MANIFOLD
Tikrit Journal of Pure Science, 2018 In this paper we study the relationship between tensor algebraic curvature tensor, and General conharmonic curvature tensor of Nearly Kahler manifold, i. e. it has a classical symmetry properties of the Riemann carvatur tensor.
Ali A. Shihab, Dhabiaʼa M. Ali
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SO(3)-Structures on 8-manifolds [PDF]
, 2011 We study Riemannian 8-manifolds with an infinitesimal action of SO(3) by which each tangent space breaks into irreducible spaces of dimensions 3 and 5.
Chiossi, Simon G., Maciá, Óscar
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, 2017 In this paper, we consider Sjamaar's holomorphic slice theorem, the birational equivalence theorem of Guillemin and Sternberg, and a number of important standard constructions that work for Hamiltonian circle actions in both the symplectic category and ...
Tolman, Susan, Watts, Jordan
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Universality of multi-field $\alpha$-attractors [PDF]
, 2018 We study a particular version of the theory of cosmological $\alpha$-attractors with $\alpha=1/3$, in which both the dilaton (inflaton) field and the axion field are light during inflation.
Achúcarro, Ana +4 more
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M-theory moduli spaces and torsion-free structures [PDF]
, 2015 Motivated by the description of $\mathcal{N}=1$ M-theory compactifications to four-dimensions given by Exceptional Generalized Geometry, we propose a way to geometrize the M-theory fluxes by appropriately relating the compactification space to a higher ...
A Strominger +29 more
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