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Multifractal Spectrum for Barycentric Averages
(Springer/Plenum Publishers, 2016-10)
Let (X, ν) and Y be a measured space and a CAT (0) space, respectively. If M2(Y ) is the set of measures on Y with finite second moment then a map bar : M2(Y ) → Y can be defined. Also, for any x ∈ X and for a map ϕ : X → ...
Ergodic theorem in CAT(0) spaces in terms of inductive means
(Cambridge University Press, 2022-03)
Let (G, +) be a compact, abelian, and metrizable topological group. In this group we take g ∈ G such that the corresponding automorphism τg is ergodic. The main result of this paper is a new ergodic theorem for functions ...
A determinação dos pontos notáveis de um triângulo utilizando o software GeoGebra
(Universidade Federal de São CarlosBRUFSCarPrograma de Mestrado Profissional em Matemática em Rede Nacional - PROFMAT, 2013-08-19)
In this paper, I intend to report the experience of implementing an activity in some classes in a public school of the city of Ribeirão Preto, state of São Paulo, where it was made an approach to the subject "Notable Points ...
The Minimal Volume of Simplices Containing a Convex Body
(Springer, 2019-01)
Let K⊂ Rn be a convex body with barycenter at the origin. We show there is a simplex S⊂ K having also barycenter at the origin such that (vol(S)vol(K))1/n≥cn, where c> 0 is an absolute constant. This is achieved using ...
Prediction of the occurrence of flares in the solar cycle 24 from the evolution of magnetic polarity barycenters in active regions
(Universidad Nacional de ColombiaBogotá - Ciencias - Maestría en Ciencias - AstronomíaObservatorio Astronómico NacionalFacultad de CienciasBogotá, ColombiaUniversidad Nacional de Colombia - Sede Bogotá, 2021)
Solar bipolar active regions and the processes that occur in them have been studied and analyzed for decades, generating many types of models and characterizations for the occurrence of different eruptive events that take ...
Modeling and analysis of a Ball and Beam system including impacts and dry friction
(2014-01-01)
The Ball and Beam system is a common didactical plant that presents a complex nonlinear dynamics. This comes from the fact that the ball rolls over the beam, which rotates around its barycenter. In order to deduce the ...
A mid-term astrometric and photometric study of trans-Neptunian object (90482) Orcus
(Edp Sciences, 2010-11)
From time series CCD observations of a fixed and large star field that contained the binary trans-Neptunian object (90482) Orcus (formerly 2004 DW), taken during a period of 33 days, we have been able to derive high-precision ...
A new imminent grand minimum?
(Cambridge University Press, 2011-10)
The planetary hypothesis of solar cycle is an old idea by which the planetary gravity acting on the Sun might have a non-negligible effect on the solar magnetic cycle. The advance of this hypothesis is based on phenomenological ...
Calibrating the Cepheid period-luminosity relation from the infrared surface brightness technique. II. The effect of metallicity and the distance to the LMC
(2011)
The extragalactic distance scale builds directly on the Cepheid Period-Luminosity (PL) relation as delineated by the sample of Cepheids in the Large Magellanic Cloud (LMC). However, the LMC is a dwarf irregular galaxy, ...