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Mostrando ítems 151-158 de 158
A Multilayer Network Model implementation for COVID-19
(2021)
We present a numerical implementation for a multilayer network to model the transmission of Covid-19 or other diseases with a similar transmission mechanism. The model incorporates different contact types between individuals ...
Hopf algebras in noncommutative geometry
(2003)
We give an introductory survey to the use of Hopf algebras in several problems of noncommutative geometry. The main example, the Hopf algebra of rooted trees, is a graded, connected Hopf algebra arising from a universal ...
Contributions to the continuity problem for Lyapunov exponents
(2018)
O objetivo deste trabalho é estudar a continuidade e a semi-continuidade dos expoentes de Lyapunov em dois contextos diferentes. O primeiro diz respeito a cociclos lineares sobre dinâmicas parcialmente hiperbólicas. É ...
Sur l’existence du schéma en groupes fondamental
(2020-06-06)
Soient S un schéma de Dedekind, X un S-schéma connexe localement de type ni et
x 2 X(S) une section. L’objet du présent papier est d’établir l’existence du schéma en groupes
fondamental de X lorsque X est à bres réduites ...
Estudio de una definición no aritmética de finitud conjuntista
(1987)
Intuitivamente, un conjunto es finito si termina quedando vacío al extraerle elementos de uno en uno. El propósito de este trabajo es formalizar esta noción de finitud conjuntista y discutir algunas propiedades que se ...
Analysis of a vorticity–based fully–mixed formulation for 3D Brinkman–Darcy problem.
(2016)
We propose and analyze a fully-mixed finite element method to numerically approximate the flow patterns of a viscous fluid within a highly permeable medium (an array of low concentration fixed particles), described by ...
Characterization of two-parameter matrix valued BMO by commutator with the Hilbert Transform
(2018)
In this paper, we prove that the space of two parameter matrix-valued BMO functions can be characterized by considering iterated commutators with the Hilbert transform. The upper estimate relies on Petermichl's representation ...
Domain Decomposition Methods for Problems in H(curl)
(2015-05)
Two domain decomposition methods for solving vector field problems posed in H(curl) and discretized with Nedelec finite elements are considered. These finite elements are conforming in H(curl). A two-level overlapping ...