Results 21 to 30 of about 528 (40)
, 2015 The main topic of this paper is to show that in the 3-dimensional Minkowski spacetime, the torsion of a null curve is equal to the Schwarzian derivative of a certain function appearing in a description of the curve.
Olszak, Zbigniew
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Linear Connections on Normal Almost Contact Manifolds with Norden Metric [PDF]
, 2010 Families of linear connections are constructed on almost contact manifolds with Norden metric. An analogous connection to the symmetric Yano connection is obtained on a normal almost contact manifold with Norden metric and closed structural 1-form.
Teofilova, Marta
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The exponential map of a $C^{1,1}$-metric
, 2014 Given a pseudo-Riemannian metric of regularity $C^{1,1}$ on a smooth manifold, we prove that the corresponding exponential map is a bi-Lipschitz homeomorphism locally around any point. We also establish the existence of totally normal neighborhoods in an
Kunzinger, Michael +2 more
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On tangent bundles of Walker four-manifolds
Open MathematicsThe aim of this study is to explore the complete lifts of almost Norden structures on tangent bundles of Walker four-manifolds. Furthermore, we examine the integrability conditions of the complete lifts JC{J}^{C} of the proper almost complex structure ...
Çayir Haşim +2 more
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Isophote curves on timelike surfaces in Minkowski 3-space
, 2012 Isophote comprises a locus of the surface points whose normal vectors make a constant angle with a fixed vector. In this paper, isophote curves are studied on timelike surfaces in Minkowski 3-space E31.
Ali +25 more
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Lamarle Formula in 3-Dimensional Lorentz Space [PDF]
, 2010 The Lamarle Formula, given by Kruppa in \cite{Kr}, is known as a relationship between the Gaussian curvature and the distribution parameter of a ruled surface in the surface theory. The ruled surfaces were investigated in 3 different classes with respect
Ersoy, Soley, Tosun, Murat
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Null Distance and Convergence of Lorentzian Length Spaces. [PDF]
Ann Henri Poincare, 2022 Kunzinger M, Steinbauer R.
europepmc +1 more source
Polyharmonic hypersurfaces into pseudo-Riemannian space forms. [PDF]
Ann Mat Pura Appl, 2023 Branding V +3 more
europepmc +1 more source
The Singularity Theorems of General Relativity and Their Low Regularity Extensions. [PDF]
Jahresber Dtsch Math Ver, 2023 Steinbauer R.
europepmc +1 more source
Hyperbolic angles in Lorentzian length spaces and timelike curvature bounds. [PDF]
J Lond Math Soc, 2023 Beran T, Sämann C.
europepmc +1 more source