Results 101 to 110 of about 587 (217)
Conformally Flat Manifolds and a Pinching Problem on the Ricci Tensor [PDF]
Samuel I. Goldberg, Mitsutaka Okumura
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On M-theory fourfold vacua with higher curvature terms
We study solutions to the eleven-dimensional supergravity action, including terms quartic and cubic in the Riemann curvature, that admit an eight-dimensional compact space.
Thomas W. Grimm+2 more
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The quantum non-linear σ-model RG flow and integrability in wormhole geometries
The target space of the non-linear σ-model is a Riemannian manifold. Although it can be any Riemannian metric, there are certain physically interesting geometries which are worth to study.
Oscar Lasso Andino+1 more
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Learning group invariant Calabi–Yau metrics by fundamental domain projections
We present new invariant machine learning models that approximate the Ricci-flat metric on Calabi–Yau (CY) manifolds with discrete symmetries. We accomplish this by combining state of the art models for predicting such metrics, based on the so-called φ ...
Yacoub Hendi+2 more
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A Ricci flat pseudo-Riemannian metric on the tangent bundle of a Riemannian manifold [PDF]
Neculai Papaghiuc
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The object of the present paper is to study a special type of spacetime. It is proved that in a conformally flat (W RS)4 spacetime with non-zero scalar curvature the vector field p defined by ɡ(X, p) = E(X) is irrotational and the integral curves of the ...
Mallick Sahanous, Chand De Uday
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Essential constants for spatially homogeneous Ricci-flat manifolds of dimension 4+1 [PDF]
T. Christodoulakis+2 more
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Generalized teleparallel de Sitter geometries. [PDF]
Coley AA+3 more
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The Ricci curvature of half-flat manifolds [PDF]
Tibra Ali, Gerald Cleaver
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