نتایج جستجو برای: finsler structure

تعداد نتایج: 1569069  

Journal: :bulletin of the iranian mathematical society 0
bing ye wu department of mathematics minjiang university

we establish some relative volume comparison theorems for extremal volume forms of‎ ‎finsler manifolds under suitable curvature bounds‎. ‎as their applications‎, ‎we obtain some results on curvature and topology of finsler manifolds‎. ‎our results remove the usual assumption on s-curvature that is needed in the literature‎.

2005
A. Zeghib

We generalize to the Finsler case, the Lelong-Ferrand-Obatta Theorem about the compactness of conformal groups of compact Riemannian manifolds, except, the standard sphere.

2007
GEORGE R. WILKENS

Following an introduction to control theory, we show how Finsler geometries occur in certain classes of control systems.

2008
Sergiu I. Vacaru

We propose a natural Fedosov type quantization of generalized Lagrange models and gravity theories with metrics lifted on tangent bundle, or extended to higher dimension, following some stated geometric/ physical conditions (for instance, nonholonomic and/or conformal transforms to some physically important metrics or mapping into a gauge model). Such generalized Lagrange transforms define cano...

Journal: :iranian journal of science and technology (sciences) 2008
e. peyghan

on a finsler manifold, we define conformal vector fields and their complete lifts and prove that incertain conditions they are homothetic.

Journal: :Journal D Analyse Mathematique 2022

We study metric spaces defined via a conformal weight, or more generally measurable Finsler structure, on domain Ω ⊂ ℝ2 that vanishes compact set E and satisfies mild assumptions. Our main question is to determine when such space quasiconformally equivalent planar domain. give characterization in terms of the notion sets are removable for mappings. also quasiconformal mapping can be factored as...

2009
Mihai Anastasiei Sergiu I. Vacaru

We study stationary configurations mimicking nonholonomic locally anisotropic black rings (for instance, with ellipsoidal polarizations and/or imbedded into solitonic backgrounds) in three/six dimensional pseudo–Finsler/ Riemannian spacetimes. In the asymptotically flat limit, for holonomic configurations, a subclass of such spacetimes contains the set of five dimensional black ring solutions w...

2003
Zhongmin Shen

The flag curvature is a natural extension of the sectional curvature in Riemannian geometry, and the S-curvature is a non-Riemannian quantity which vanishes for Riemannian metrics. There are (incomplete) nonRiemannian Finsler metrics on an open subset in Rn with negative flag curvature and constant S-curvature. In this paper, we are going to show a global rigidity theorem that every Finsler met...

2009
Sergiu I. Vacaru

We model pseudo–Finsler geometries, with pseudo–Euclidean signatures of metrics, for two classes of four dimensional nonholonomic manifolds: a) tangent bundles with two dimensional base manifolds and b) pseudo–Riemannian/ Einstein manifolds. Such spacetimes are enabled with nonholonomic distributions and associated nonlinear connection structures and theirs metrics are solutions of the field eq...

2005
Volker Perlick

It is shown that, on a manifold with a Finsler metric of Lorentzian signature, the lightlike geodesics satisfy the following variational principle. Among all lightlike curves from a point q (emission event) to a timelike curve γ (worldline of receiver), the lightlike geodesics make the arrival time stationary. Here “arrival time” refers to a parametrization of the timelike curve γ. This variati...

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