Results 51 to 60 of about 313 (89)

Perfect Fluid Spacetimes Admitting Almost Riemann Solitons

Axioms
In this investigation, we examine the geometric character of almost Riemann solitons and gradient almost Riemann solitons in the context of perfect fluid solutions of the Einstein equations that admit a torse-forming vector field ζ.
Mehdi Jafari, Shahroud Azami
doaj   +1 more source

The geometric Cauchy problem for developable submanifolds

, 2019
Given a smooth distribution $\mathscr{D}$ of $m$-dimensional planes along a smooth regular curve $\gamma$ in $\mathbb{R}^{m+n}$, we consider the following problem: To find an $m$-dimensional developable submanifold of $\mathbb{R}^{m+n}$, that is, a ruled
Raffaelli, Matteo
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Natural PDE's of Linear Fractional Weingarten surfaces in Euclidean Space [PDF]

, 2012
We prove that the natural principal parameters on a given Weingarten surface are also natural principal parameters for the parallel surfaces of the given one. As a consequence of this result we obtain that the natural PDE of any Weingarten surface is the
Ganchev, Georgi, Mihova, Vesselka
core  

On Decomposable Almost Pseudo Conharmonically Symmetric Manifolds [PDF]

, 2012
summary:The object of the present paper is to study decomposable almost pseudo conharmonically symmetric ...
Yilmaz, Hülya Bağdatlı
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On pseudosymmetric manifolds

, 2015
In the literature, there are two different notions of pseudosymmetric manifolds, one by Chaki [7] and other by Deszcz [16], and there are many papers related to these notions.
Deszcz, Ryszard, Hotlos, Marin, Jelwicki, Jan, Kundu, Haradhan, Shaikh, Absos Ali   +4 more
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SOME RESULTS ON YAMABE SOLITONS ON NEARLY HYPERBOLIC SASAKIAN MANIFOLDS [PDF]

We classify almost Yamabe on nearly hyperbolic Sasakian manifolds whose potential vector field is torse-forming admitting semi-symmetric metric connection and quarter symmetric non-metric connection. Certain results of such solitons on CR-submanifolds of
Siddiqi, Mohd. Danish, Suthar, D. L., Yadav, Sunil Kumar   +2 more
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Generalized Almost Schouten Solitons in LP-Sasakian Geometry and Relativistic Spacetimes

AppliedMath
The objective of this work is to characterize certain geometric aspects of LP-Sasakian (LPS) manifolds admitting a generalized almost Schouten soliton (GASS) and to prove that a such manifold with GASS is of constant scalar curvature.
Sunil Kumar Yadav, Najwa Mohammed Al-Asmari, Abdul Haseeb   +2 more
doaj   +1 more source

Characterizations of a Lorentzian Manifold with a semi-symmetric metric connection [PDF]

In this article, we characterize a Lorentzian manifold $\mathcal{M}$ with a semi-symmetric metric connection. At first, we consider a semi-symmetric metric connection whose curvature tensor vanishes and establish that if the associated vector field is a ...
De, Krishnendu, De, Uday Chand, Güler, Sinem   +2 more
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Pair of Associated η-Ricci–Bourguignon Almost Solitons with Vertical Torse-Forming Potential on Almost Contact Complex Riemannian Manifolds

Mathematics
Each of the studied manifolds has a pair of B-metrics, interrelated by an almost contact structure. The case where each of these metrics gives rise to an η-Ricci–Bourguignon almost soliton, where η is the contact form, is studied.
Mancho Manev
doaj   +1 more source

$\eta$-Ricci solitons in $(\varepsilon)$-almost paracontact metric manifolds

, 2017
The object of this paper is to study $\eta$-Ricci solitons on $(\varepsilon)$-almost paracontact metric manifolds. We investigate $\eta$-Ricci solitons in the case when its potential vector field is exactly the characteristic vector field $\xi$ of the $(\
Acet, Bilal Eftal, Blaga, Adara Monica, Erdoğan, Feyza Esra, Perktaş, Selcen Yüksel   +3 more
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