Results 81 to 90 of about 1,290 (90)

Examples of cosmological spacetimes without CMC Cauchy surfaces. [PDF]

Lett Math Phys
Ling E, Ohanyan A.
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Gluing constructions for Lorentzian length spaces. [PDF]

Manuscr Math
Beran T, Rott F.
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Equiform spacelike Smarandache curves of anti-eqiform Salkowski curve according to equiform frame

, 2021
In this paper, we construct the equiform spacelike Smarandache curves of spacelike anti-equiform Salkowski curves with timelike binormal according to equiform frame in R3 1. Furthermore, we calculate the equiform Frenet apparatus of these curves. Finally,
E. Solouma
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Some Characterizations of Generalized Null Mannheim Curves in Semi-Euclidean Space

Journal of Geometry and Symmetry in Physics, 2020
Communicated by Ivaïlo M. Mladenov Abstract. In the present paper, we investigate Cartan framed generalized null Mannheim curves in the four-dimensional semi-Euclidean space of index two. We construct the Cartan (or Frenet) frames and curvature functions
Nihal Kiliç Aslan, K. Ilarslan
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Screen Transversal Lightlike Submanifolds of Indefinite Kenmotsu Manifolds

Sarajevo Journal of Mathematics
In this paper, we introduce screen transversal lightlike submanifolds of indefinite Kenmotsu manifolds. We obtain a characterization of screen transversal anti-invariant lightlike submanifolds as well as a condition for induced connection to be a metric ...
Ram Shankar Gupta, A. Sharfuddin
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Warped Product Lightlike Submanifolds

Sarajevo Journal of Mathematics
e study a new class of lightlike submanifolds $M$, called warped product lightlike submanifolds, of a semi-Riemann manifold. We show that the null geometry of $M$ reduces to the corresponding non-degenerate geometry of its semi-Riemann submanifold ...
Bayram Şahin
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Curvature via the de Sitter’s Space-Time

Sarajevo Journal of Mathematics
We define the central curvature and the total central curvature of a closed curve in a Lorentz $(n + 1)$--space. In addition, we obtain estimates for the total central curvatures of spacelike pure polygons. The study is done by using the n-dimensional de
G. Desideri
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A Note on Osserman Lorentzian Manifolds

, 1997
N. Blažić, N. Bokan, P. Gilkey
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Recent developments in pseudo-Riemannian holonomy theory

, 2010
A. Galaev, T. Leistner
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Conformal transformations of pseudo-Riemannian manifolds

, 2008
W. Kühnel, H. Rademacher
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