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Geometry of Control-Affine Systems [PDF]

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2009
Motivated by control-affine systems in optimal control theory, we introduce the notion of a point-affine distribution on a manifold X - i.e., an affine distribution F together with a distinguished vector field contained in F.
Clelland, Jeanne N.   +2 more
core   +6 more sources

Singularity Classes of Special 2-Flags [PDF]

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2009
In the paper we discuss certain classes of vector distributions in the tangent bundles to manifolds, obtained by series of applications of the so-called generalized Cartan prolongations (gCp).
Mormul, Piotr
core   +5 more sources

Local Distributional Chaos

open access: yesQualitative Theory of Dynamical Systems, 2022
In discrete dynamical system $(X, f)$ where $X$ is a topological space and $f \in C(X,X)$, three notions of distributional chaos were defined. They were denoted by $DC1, DC2$ and $DC3$. For interval systems such three notions coincide and they will be denoted by DC-chaos. Generally speaking we have $DC1 \subseteq DC2 \subseteq DC3$-chaos.
Francisco Balibrea, Lenka Rucká
openaire   +3 more sources

COVID-19 in Saudi Arabia: An Overview

open access: yesFrontiers in Public Health, 2022
BackgroundSaudi Arabia, a prominent Arabian country, has 35. 3 million persons living in 2.2 million square kilometers, undergone serious threats recently due to the COVID-19 pandemic.
Asharaf Abdul Salam   +2 more
doaj   +1 more source

Asymptotical expansions in the Kubilius theorem of large deviations

open access: yesLietuvos Matematikos Rinkinys, 2005
In the present paper, a local theorem of large deviations for arithmetic functions defined in Knopfmacher’s semigroup is obtained.
Rimantas Skrabutėnas
doaj   +3 more sources

Refuge distributions and landscape connectivity affect host-parasitoid dynamics: Motivations for biological control in agroecosystems

open access: yesPLoS ONE, 2022
Species distributions are affected by landscape structure at different spatial scales. Here we study how the interplay between dispersal at different spatial scales and landscape connectivity and composition affect local species dynamics.
Lucas D. Fernandes   +3 more
doaj   +2 more sources

Spectral Energy Distributions for 258 Local Volume Galaxies

open access: yesThe Astronomical Journal, 2023
We present model spectral energy distribution (SED) fits to ultraviolet/optical/infrared observations for the 258 nearby galaxies in the Local Volume Legacy survey, a sample dominated by lower-luminosity dwarf irregular systems.
Daniel A. Dale   +5 more
doaj   +1 more source

Tales of Tails

open access: yesEntropy, 2023
Typical human-scaled considerations of thermodynamic states depend primarily on the core of associated speed or other relevant distributions, because the wings of those distributions are so improbable that they cannot contribute significantly to averages.
Christopher Essex, Bjarne Andresen
doaj   +1 more source

Local Dependence for Bivariate Weibull Distributions Created by Archimedean Copula

open access: yesمجلة بغداد للعلوم, 2021
In multivariate survival analysis, estimating the multivariate distribution functions and then measuring the association between survival times are of great interest.
Swar O. Ahmed   +2 more
doaj   +1 more source

Local distributions of multiplicative functions

open access: yesLietuvos Matematikos Rinkinys, 1999
In the present paper the local distribution laws of values of multiplicative arithmetic functions g : G → R defined on arithmetical semigroups G and belonging to the class M(G) is considered.
Rimantas Skrabutėnas
doaj   +3 more sources

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