Results 21 to 30 of about 26,777 (280)
On the non metrizability of Berwald Finsler spacetimes [PDF]
, 2020 We investigate whether Szabo's metrizability theorem can be extended to Finsler spaces of indefinite signature. For smooth, positive definite Finsler metrics, this important theorem states that, if the metric is of Berwald type (i.e., its Chern-Rund ...
Fuster, Andrea +3 more
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F-theory on 6D symmetric toroidal orbifolds
Journal of High Energy Physics, 2022 In this work we study F-theory on symmetric toroidal orbifolds that exhibit roto-translations, which are point group rotations accompanied by fractional lattice shifts. These geometries admit a rich class of effects, such as twisted affine folded fibers,
Finn Bjarne Kohl +2 more
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Homogeneous and anisotropic cosmologies with affine EoS: a dynamical system perspective
European Physical Journal C: Particles and Fields, 2023 We study a class of homogeneous and anisotropic geometries with affine equation of state (EoS) for different physically plausible scenarios of the universe evolution using dynamical system technique.
Ashutosh Singh
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ON A CLASS OF EDGE-TRANSITIVE DISTANCE-REGULAR ANTIPODAL COVERS OF COMPLETE GRAPHS
Ural Mathematical Journal, 2021 The paper is devoted to the problem of classification of edge-transitive distance-regular antipodal covers of complete graphs. This extends the classification of those covers that are arc-transitive, which has been settled except for some tricky cases ...
Ludmila Yu. Tsiovkina
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Integrating geometries of ReLU feedforward neural networks
Frontiers in Big Data, 2023 This paper investigates the integration of multiple geometries present within a ReLU-based neural network. A ReLU neural network determines a piecewise affine linear continuous map, M, from an input space ℝm to an output space ℝn.
Yajing Liu +3 more
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LDPC codes associated with linear representations of geometries [PDF]
, 2010 We look at low density parity check codes over a finite field K associated with finite geometries T*(2) (K), where K is any subset of PG(2, q), with q = p(h), p not equal char K. This includes the geometry LU(3, q)(D), the generalized quadrangle T*(2)(K)
Vandendriessche, Peter
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Translational Research in Anatomy, 2021 Introduction: Systematic identification of anatomical variants and anomalies in large patient populations remains problematic. The purpose of this study is to determine whether anatomical anomalies of the hyoid region can be quantitatively characterized,
Ahmed Z. Abdelkarim +7 more
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Multipole solutions in metric--affine gravity
, 1998 Above Planck energies, the spacetime might become non--Riemannian, as it is known fron string theory and inflation. Then geometries arise in which nonmetricity and torsion appear as field strengths, side by side with curvature.
Alfredo Macías +34 more
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Gravitational Phase Operator and Cosmic Strings [PDF]
, 1995 A quantum equivalence principle is formulated by means of a gravitational phase operator which is an element of the Poincare group. This is applied to the spinning cosmic string which suggests that it may (but not necessarily) contain gravitational ...
A. Ashtekar +42 more
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Spacetimes with vector distortion: Inflation from generalised Weyl geometry
Physics Letters B, 2016 Spacetime with general linear vector distortion is introduced. Thus, the torsion and the nonmetricity of the affine connection are assumed to be proportional to a vector field (and not its derivatives).
Jose Beltrán Jiménez, Tomi S. Koivisto
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