نتایج جستجو برای: lift metric

تعداد نتایج: 93401  

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: :bulletin of the iranian mathematical society 2011
a. heydari e. peyghan

In this paper, some properties of the periodic shadowing are presented. It is shown that a homeomorphism has the periodic shadowing property if and only if so does every lift of it to the universal covering space. Also, it is proved that continuous mappings on a compact metric space with the periodic shadowing and the average shadowing property also have the shadowing property and then are chao...

A. Tayebiii E. Peyghani

Let  be an n-dimensional Riemannian manifold, and  be its tangent bundle with the lift metric. Then every infinitesimal fiber-preserving conformal transformation  induces an infinitesimal homothetic transformation on .  Furthermore,  the correspondence   gives a homomorphism of the Lie algebra of infinitesimal fiber-preserving conformal transformations on  onto the Lie algebra of infinitesimal ...

We characterize the natural diagonal almost product (locally product) structures on the tangent bundle of a Riemannian manifold. We obtain the conditions under which the tangent bundle endowed with the determined structure and with a metric of natural diagonal lift type is a Riemannian almost product (locally product) manifold, or an (almost) para-Hermitian manifold. We find the natural diagona...

Journal: :Filomat 2021

In this paper, we firstly determine a new deformed Sasaki type lift of metric from Riemannian manifold to its coframe bundle and investigate few special (1.1)-tensor structures (i.e. almost Hermit structures) in the equipped with lift.

Journal: :Intell. Data Anal. 2009
Sergio Storari Fabrizio Riguzzi Evelina Lamma

In data mining, association and correlation rules are inferred from data in order to highlight statistical dependencies among attributes. The metrics defined for evaluating these rules can be exploited to score relationships between attributes in Bayesian network learning. In this paper, we propose two novel methods for learning Bayesian networks from data that are based on the K2 learning algo...

2012
Florian T. Muijres L. Christoffer Johansson Melissa S. Bowlin York Winter Anders Hedenström

Flight is one of the energetically most costly activities in the animal kingdom, suggesting that natural selection should work to optimize flight performance. The similar size and flight speed of birds and bats may therefore suggest convergent aerodynamic performance; alternatively, flight performance could be restricted by phylogenetic constraints. We test which of these scenarios fit to two m...

2006
Aaron Peterson Stephen Taylor

We consider a surface M immersed in R with induced metric g = ψδ2 where δ2 is the two dimensional Euclidean metric. We then construct a system of partial differential equations that constrain M to lift to a minimal surface via the Weierstrauss-Enneper representation, demanding the metric is of the above form. It is concluded that the associated surfaces connecting the prescribed minimal surface...

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