Results 111 to 120 of about 28,894 (211)
Symbolic approximations to Ricci-flat metrics via extrinsic symmetries of Calabi–Yau hypersurfaces
Machine Learning: Science and TechnologyEver since Yau’s non-constructive existence proof of Ricci-flat metrics on Calabi–Yau (CY) manifolds, finding their explicit construction remains a major obstacle to development of both string theory and algebraic geometry.
Viktor Mirjanić, Challenger Mishra
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Mass-deformed M2 branes in Stenzel space
Journal of High Energy Physics, 2017 We obtain finite-temperature M2 black branes in 11-dimensional supergravity, in a G 4-flux background whose self-dual part approaches a solution of Cvetič, Gibbons, Lü, and Pope, based upon Stenzel’s family of Ricci-flat Kähler deformed cones.
Óscar J. C. Dias +3 more
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On quasirecurrent manifolds [PDF]
Mathematica BohemicaWe introduce a type of Riemannian manifolds (namely, quasirecurrent manifold) and study its several geometric properties. Among others, we prove that the scalar curvature of such a manifold is constant, and that the manifold is Einstein under certain ...
Jaeman Kim
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On LP-Kenmotsu Manifold with Regard to Generalized Symmetric Metric Connection of Type (α, β)
MathematicsIn the current article, we examine Lorentzian para-Kenmotsu (shortly, LP-Kenmotsu) manifolds with regard to the generalized symmetric metric connection ∇G of type (α,β).
Doddabhadrappla Gowda Prakasha +3 more
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An attempt to geometrize electromagnetism
Open Physics, 2018 This study investigates the curved worldline of a charged particle accelerated by an electromagnetic field in flat spacetime. A new metric, which dependes on the charge-to-mass ratio and electromagnetic potential, is proposed to describe the curve ...
Huang XiuLin, Xu Yan, Liu ChengZhi
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Journal of High Energy Physics, 2019 We study the perturbative unitarity of scattering amplitudes in general dimensional reductions of Yang-Mills theories and general relativity on closed internal manifolds.
James Bonifacio, Kurt Hinterbichler
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Advances in High Energy Physics, 2013 We consider a multidimensional Kaluza-Klein (KK) model with a Ricci-flat internal space, for example, a Calabi-Yau manifold. We perturb this background metrics by a system of gravitating masses, for example, astrophysical objects such as our Sun.
Alexey Chopovsky +2 more
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Conformally Flat Manifolds and a Pinching Problem on the Ricci Tensor [PDF]
, 1976 Samuel I. Goldberg, Mitsutaka Okumura
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Complete Ricci-flat K�hler manifolds of infinite topological type
Communications in Mathematical Physics, 1989 We display an infinite dimensional family of complete Ricci-flat Kahler manifolds of complex dimension 2, for which the second homology is infinitely generated. These are obtained from the Gibbons-Hawking Ansatz [2] by using infinitely many, sparsely distributed centers.
Claude LeBrun +3 more
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Learning group invariant Calabi–Yau metrics by fundamental domain projections
Machine Learning: Science and TechnologyWe 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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