Results 21 to 30 of about 1,924 (155)

A Note on Coeffective 1–Differentiable Cohomology

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2014
After a brief review of some basic notions concerning 1-differentiable cohomology, named here ď-cohomology, we introduce a Lichnerowicz ď– cohomology in a classical way.
Ida Cristian, Mercheşan Sabinşan
doaj   +1 more source

Fear Effect on a Predator–Prey Model with Non-Differential Fractional Functional Response

open access: yesFractal and Fractional, 2023
In this paper, we study the factor of the fear effect in a predator–prey model with prey refuge and a non-differentiable fractional functional response due to the group defense.
Salam Mohammed Ghazi Al-Mohanna   +1 more
doaj   +1 more source

Soliton on Sasakian manifold endowed with quarter-symmetric non-metric connection on the tangent bundle [PDF]

open access: yesArab Journal of Mathematical Sciences
PurposeThe purpose of this paper is to study the properties of the solitons on Sasakian manifold on the tangent bundle with respect to quarter symmetric non metric connection.Design/methodology/approachWe used the vertical and complete lifts, Ricci ...
Lalnunenga Colney, Rajesh Kumar
doaj   +1 more source

On a structure satisfying FK−(−)K+1F=0

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1996
In this paper we shall obtain certain results on the structure defined by F(K,−(−)K+1) and satisfying FK−(−)K+1F=0, where F is a non null tensor field of the type (1,1) Such a structure on an n-dimensional differentiable manifold Mn has been called F(K,−(
Lovejoy S. Das
doaj   +1 more source

A Set of Axioms for the Degree of a Tangent Vector Field on Differentiable Manifolds

open access: yesFixed Point Theory and Applications, 2010
Given a tangent vector field on a finite-dimensional real smooth manifold, its degree (also known as characteristic or rotation) is, in some sense, an algebraic count of its zeros and gives useful information for its associated ordinary differential ...
Marco Spadini   +2 more
doaj   +2 more sources

Examples of the Application of Nonparametric Information Geometry to Statistical Physics

open access: yesEntropy, 2013
We review a nonparametric version of Amari’s information geometry in which the set of positive probability densities on a given sample space is endowed with an atlas of charts to form a differentiable manifold modeled on Orlicz Banach spaces.
Giovanni Pistone
doaj   +1 more source

A note on geodesic and almost geodesic mappings of homogeneous Riemannian manifolds [PDF]

open access: yesOpuscula Mathematica, 2005
Let \(M\) be a differentiable manifold and denote by \(\nabla\) and \(\tilde{\nabla}\) two linear connections on \(M\). \(\nabla\) and \(\tilde{\nabla}\) are said to be geodesically equivalent if and only if they have the same geodesics.
Stanisław Formella
doaj  

On a class of differential-algebraic equations with infinite delay

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2011
We study the set of $T$-periodic solutions of a class of $T$-periodically perturbed Differential-Algebraic Equations, allowing the perturbation to contain a distributed and possibly infinite delay.
Luca Bisconti, Marco Spadini
doaj   +1 more source

Formation Control of Spacecraft Based on SE(3) With Asymmetric Saturated Input

open access: yesIEEE Access, 2023
In this paper, a set of integrated control problems for distributed spacecraft formation with input asymmetric constraints under external disturbances are studied.
Chaobo Li   +4 more
doaj   +1 more source

Reduction of Bundles, Connection, Curvature, and Torsion of the Centered Planes Space at Normalization

open access: yesMathematics, 2019
The space Π of centered m-planes is considered in projective space P n . A principal bundle is associated with the space Π and a group connection is given on the principal bundle. The connection is not uniquely induced at the
Olga Belova
doaj   +1 more source

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