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We compare the notions of metric-compatibility and torsion of a connection in the frameworks of Beggs-Majid and Mesland-Rennie. It follows that for $\ast$-preserving connections, compatibility with a real metric in the sense of Beggs-Majid…

Quantum Algebra · Mathematics 2025-09-16 Jyotishman Bhowmick , Bappa Ghosh , Satyajit Guin

Integral formulae for foliated Riemannian manifolds provide obstructions for existence of foliations or compact leaves of them with given geometric properties. This paper continues our recent study and presents new integral formulae and…

Differential Geometry · Mathematics 2019-11-21 Vladimir Rovenski , Paweł Walczak

In this article we review the recent results about the flag curvature of invariant Randers metrics on homogeneous manifolds and by using a counter example we show that the formula which obtained for the flag curvature of these metrics is…

Differential Geometry · Mathematics 2016-12-30 E. Esrafilian , H. R. Salimi Moghaddam

A Finsler space is called Ricci-quadratic if its Ricci curvature $Ric(x,y)$ is quadratic in $y$. It is called a Berwald space if its Chern connection defines a linear connection directly on the underlying manifold $M$. In this article, we…

Differential Geometry · Mathematics 2012-07-10 Shaoqiang Deng , Zhiguang Hu

In Theorem 1, we generalize the results of Szabo for Berwald metrics that are not necessary strictly convex: we show that for every Berwald metric F there always exists a Riemannian metric affine equivalent to F. As an application we show…

Differential Geometry · Mathematics 2011-08-22 Vladimir S. Matveev

In this paper, we study the Randers metrics of weakly isotropic scalar curvature. We prove that a Randers metric of weakly isotropic scalar curvature must be of isotropic $S$-curvature. Further, we prove that a conformally flat Randers…

Differential Geometry · Mathematics 2020-06-19 Xinyue Cheng , Yannian Gong

By a Randers' structure on a manifold $M$ we mean a Finsler structure $L^*=L+\alpha$, where $L$ is a Riemannian structure and $\alpha$ is a 1-form on $M$. This structure was first introduced by Randers ~\cite{[8]} from the standpoint of…

Differential Geometry · Mathematics 2007-05-23 Aly A. Tamim , Nabil L. Youssef

Schr\"odinger connections are a special class of affine connections, which despite being metric incompatible, preserve length of vectors under autoparallel transport. In the present paper, we introduce a novel coordinate-free formulation of…

General Relativity and Quantum Cosmology · Physics 2024-12-09 Lehel Csillag , Anish Agashe , Damianos Iosifidis

In this short article, using a left-invariant Randers metric $F$, we define a new left-invariant Randers metric $\tilde{F}$. We show that $F$ is of Berwald (Douglas) type if and only if $\tilde{F}$ is of Berwald (Douglas) type. In the case…

Differential Geometry · Mathematics 2024-08-01 Azar Fatahi , Masoumeh Hosseini , Hamid Reza Salimi Moghaddam

We study the symmetries of the Lorentz violating Randers-Finsler spacetime. The privileged frame defined by the background vector diagonalises the deformed mass-shell and provides an anisotropic observer transformations. The particle…

High Energy Physics - Theory · Physics 2016-02-25 J. E. G. Silva

In the present work we consider an almost complex manifold with Norden metric (i.e. a metric with respect to which the almost complex structure is an antiisometry). On such a manifold we study a linear connection preserving the almost…

Differential Geometry · Mathematics 2011-01-24 Dimitar Mekerov

We show that the metrical connection can be introduced in the two-dimensional Finsler space such that entailed parallel transports along curves joining points of the underlying manifold keep the two-vector angle as well as the length of the…

Differential Geometry · Mathematics 2009-09-10 G. S. Asanov

Several examples and models based on noncommutative differential calculi on commutative algebras indicate that a metric should be regarded as an element of the left-linear tensor product of the space of 1-forms with itself. We show how the…

General Relativity and Quantum Cosmology · Physics 2011-04-15 Aristophanes Dimakis , Folkert Muller-Hoissen

In this paper we study the geometry of simply connected two-step nilpotent Lie groups of dimension five. We give the Levi-Civita connection, curvature tensor, sectional and scalar curvatures of these spaces and show that they have constant…

Differential Geometry · Mathematics 2016-12-30 H. R. Salimi Moghaddam

We show that two-dimensional conformally related Douglas metrics are Randers

Differential Geometry · Mathematics 2021-06-08 Vladimir S. Matveev , Samaneh Saberali

In the present paper, we study the Randers metric on two-spheres of revolution in order to obtain new families of Finsler of Randers type metrics with simple cut locus. We determine the geodesics behavior, conjugate and cut loci of some…

Differential Geometry · Mathematics 2023-09-22 Rattanasak Hama , Sorin V. Sabau

This paper looks at how changes of coordinates on a pseudo-Riemannian manifold induce homogeneous linear transformations on its tangent spaces. We see that a pseudo-orthonormal frame in a given tangent space is the basis for a set of…

General Physics · Physics 2022-11-15 Tom Lawrence

Shape spaces are fundamental in a variety of applications including image registration, morphing, matching, interpolation, and shape optimization. In this work, we consider two-dimensional shapes represented by triangular meshes of a given…

Numerical Analysis · Mathematics 2022-01-11 Roland Herzog , Estefanía Loayza-Romero

Recently, wind Riemannian structures (WRS) have been introduced as a generalization of Randers and Kropina metrics. They are constructed from the natural data for Zermelo navigation problem, namely, a Riemannian metric $g_R$ and a vector…

Differential Geometry · Mathematics 2018-05-22 Miguel Angel Javaloyes , Miguel Sánchez

For a system of second order differential equations we determine a nonlinear connection that is compatible with a given generalized Lagrange metric. Using this nonlinear connection, we can find the whole family of metric nonlinear…

Differential Geometry · Mathematics 2009-08-12 Ioan Bucataru