Results 101 to 110 of about 587 (217)

On M-theory fourfold vacua with higher curvature terms

open access: yesPhysics Letters B, 2015
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
doaj  

The quantum non-linear σ-model RG flow and integrability in wormhole geometries

open access: yesNuclear Physics B, 2023
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
doaj  

Learning group invariant Calabi–Yau metrics by fundamental domain projections

open access: yesMachine Learning: Science and Technology
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
doaj   +1 more source

On a type of spacetime [PDF]

open access: yesMathematica Moravica, 2014
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
doaj  

ePoster

open access: yes
European Journal of Neurology, Volume 32, Issue S1, June 2025.
wiley   +1 more source

Generalized teleparallel de Sitter geometries. [PDF]

open access: yesEur Phys J C Part Fields, 2023
Coley AA   +3 more
europepmc   +1 more source

The Ricci curvature of half-flat manifolds [PDF]

open access: bronze, 2007
Tibra Ali, Gerald Cleaver
openalex   +1 more source

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