Results 41 to 50 of about 6,630 (141)

Inflation from Minkowski space [PDF]

Journal of High Energy Physics, 2014
We propose a class of scalar models that, once coupled to gravity, lead to cosmologies that smoothly and stably connect an inflationary quasi-de Sitter universe to a low, or even zero-curvature, maximally symmetric spacetime in the asymptotic past, strongly violating the null energy condition ($\dot H\gg H^2$) at intermediate times.
PIRTSKHALAVA, DAVID, SANTONI, LUCA, TRINCHERINI, ENRICO, Uttayarat, Patipan   +3 more
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Celestial holography and AdS 3/CFT 2 from a scaling reduction of twistor space

Journal of High Energy Physics, 2023
Celestial amplitudes obtained from Mellin transforming 4d momentum space scattering amplitudes contain distributional delta functions, hindering the application of conventional CFT techniques.
Wei Bu, Sean Seet
doaj   +1 more source

The 𝔪-WG° inverse in the Minkowski space

Open Mathematics, 2023
In this article, we study the m{\mathfrak{m}}-WG∘{}^{\circ } inverse which presents a generalization of the m{\mathfrak{m}}-WG inverse in the Minkowski space. We first show the existence and the uniqueness of the generalized inverse.
Liu Xiaoji, Zhang Kaiyue, Jin Hongwei
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Orlicz Mean Dual Affine Quermassintegrals

Journal of Function Spaces, 2018
Our main aim is to generalize the mean dual affine quermassintegrals to the Orlicz space. Under the framework of dual Orlicz-Brunn-Minkowski theory, we introduce a new affine geometric quantity by calculating the first Orlicz variation of the mean dual ...
Chang-Jian Zhao, Wing-Sum Cheung
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Conull hypersurfaces in Minkowski space [PDF]

Proceedings of the American Mathematical Society, 1982
A submanifold of M =
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Metric field as emergence of Hilbert space

Scientific Reports
First, we explain some ambiguities of spacetime and metric field as fundamental concepts. Then, from the Unruh effect point of view and using the Gelfand–Naimark–Segal construction, we construct an operator as a quanta of acceleration that we call ...
Maysam Yousefian, Mehrdad Farhoudi
doaj   +1 more source

Geometric analysis of non-degenerate shifted-knots Bézier surfaces in Minkowski space.

PLoS ONE
In this paper, we investigate the properties of timelike and spacelike shifted-knots Bézier surfaces in Minkowski space-[Formula: see text]. These surfaces are commonly used in mathematical models for surface formation in computer science for computer ...
Sadia Bashir, Daud Ahmad
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Ordering events in Minkowski space

Advances in Applied Mathematics, 2006
17 ...
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Spacetime and Reality: Facing the Ultimate Judge [PDF]

, 2012
Over a hundred years ago in his paper "Space and Time" Hermann Minkowski demonstrated the profound meaning of the relativity postulate - the experimental fact that physical phenomena are the same in all inertial reference frames implies that the ...
Petkov, Vesselin
core  

On the Gauss Map of Surfaces of Revolution with Nonlightlike Axis in Minkowski 3-Space

Abstract and Applied Analysis, 2014
We study surfaces of revolution with a nonlightlike axis in 3-dimensional Minkowski space and classify such surfaces in terms of the Gauss map G that satisfies the condition ΔhG=ΛG, with Λ being a 3×3 real matrix.
Minghao Jin, Donghe Pei
doaj   +1 more source