Results 31 to 40 of about 42,669 (197)
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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Some Conformal Transformations on Finsler Warped Product Manifolds
Mathematics, 2023 The conformal transformation, which preserves Einstein metrics on Finsler warped product manifolds, is studied in this paper. We obtain sufficient and necessary conditions of a conformal transformation preserving Einstein metrics. In addition, we provide
Yuze Ren, Xiaoling Zhang, Lili Zhao
doaj +1 more source
A Note on the Characterization of Two-Dimensional Quasi-Einstein Manifolds
Mathematics, 2020 In this article, we aim to introduce new classes of two-dimensional quasi-Einstein pseudo-Riemannian manifolds with constant curvature. We also give a classification of 2D quasi-Einstein manifolds of warped product type working in local coordinates.
Gabriel Bercu
doaj +1 more source
Some Homogeneous Einstein Manifolds [PDF]
Nagoya Mathematical Journal, 1970 Let G be a connected Lie group and H a closed subgroup with Lie algebra such that in the Lie algebra g of G there exists a subspace m with (subspace direct sum) and In this case the corresponding manifold M = G/H is called a reductive homogeneous space and (g,) (or (G,H)) a reductive pair.
openaire +2 more sources
AASLD practice guidance on drug, herbal, and dietary supplement–induced liver injury
, 2022 Hepatology, EarlyView.
Robert J. Fontana +6 more
wiley +1 more source
On Generalized Φ- Recurrent of Kenmotsu Type Manifolds
مجلة بغداد للعلوم, 2022 The present paper studies the generalized Φ- recurrent of Kenmotsu type manifolds. This is done to determine the components of the covariant derivative of the Riemannian curvature tensor.
Habeeb M. Abood , Mohammed Y. Abass
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Type I Almost-Homogeneous Manifolds of Cohomogeneity One—IV
Axioms, 2018 This paper is one of a series in which we generalize our earlier results on the equivalence of existence of Calabi extremal metrics to the geodesic stability for any type I compact complex almost homogeneous manifolds of cohomogeneity one. In this paper,
Zhuang-Dan Daniel Guan +2 more
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7D supersymmetric Yang-Mills on curved manifolds
Journal of High Energy Physics, 2017 We study 7D maximally supersymmetric Yang-Mills theory on curved manifolds that admit Killing spinors. If the manifold admits at least two Killing spinors (Sasaki-Einstein manifolds) we are able to rewrite the supersymmetric theory in terms of a ...
Konstantina Polydorou +2 more
doaj +1 more source
Cosmologies with turning points
Physics Letters B, 2023 We explore singularity-free and geodesically-complete cosmologies based on manifolds that are not quite Lorentzian. The metric can be either smooth everywhere or non-degenerate everywhere, but not both, depending on the coordinate system.
Bob Holdom
doaj +1 more source
Holonomy algebras of Einstein pseudo-Riemannian manifolds
, 2018 The holonomy algebras of Einstein not Ricci-flat pseudo-Riemannian manifolds of arbitrary signature are classified. As illustrating examples, the cases of Lorentzian manifolds, pseudo-Riemannian manifolds of signature $(2,n)$ and the para-quaternionic-K\"
Galaev, Anton S.
core +1 more source