Hermitian
Mostrando 1-12 de 34 artigos, teses e dissertações.
-
1. Three-dimensional compatible finite element stress analysis of spinning two-directional FGM annular plates and disks with load and elastic foundation non-uniformities
Three-dimensional bending and stress analyses of the rotating two-directional functionally graded annular/circular plates or disks have not been accomplished so far. This task is performed in the present paper, employing a finite element formulation with a C¹-continuity. Therefore, both transversely graded and radiallygraded plates may be analyzed as specia
Lat. Am. j. solids struct.. Publicado em: 2013-09
-
2. An alternating LHSS preconditioner for saddle point problems
In this paper, we present a new alternating local Hermitian and skew-Hermitian splitting preconditioner for solving saddle point problems. The spectral property of the preconditioned matrices is studies in detail. Theoretical results show all eigenvalues of the preconditioned matrices will generate two tight clusters, one is near (0, 0) and the other is near
Comput. Appl. Math.. Publicado em: 2012
-
3. O arco associado a uma generalização da curva Hermitiana / The arc arising from a generalization of the Hermitian curve
Obtemos novos arcos completos associados ao conjunto de pontos racionais de uma certa generalização da curva Hermitiana que é Frobenius não-clássica. A construção está relacionada ao cálculo do número de pontos racionais de uma classe de curvas de Artin-Schreier
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/12/2011
-
4. Spectral properties of the preconditioned AHSS iteration method for generalized saddle point problems
In this paper, we study the distribution on the eigenvalues of the preconditioned matrices that arise in solving two-by-two block non-Hermitian positive semidefinite linear systems by use of the accelerated Hermitian and skew-Hermitian splitting iteration methods. According to theoretical analysis, we prove that all eigenvalues of the preconditioned matrices
Computational & Applied Mathematics. Publicado em: 2010-06
-
5. Basic quantum mechanics for three Dirac equations in a curved spacetime
We study the basic quantum mechanics for a fully general set of Dirac matrices in a curved spacetime by extending Pauli's method. We further extend this study to three versions of the Dirac equation: the standard (Dirac-Fock-Weyl or DFW) equation, and two alternative versions, both of which are based on the recently proposed linear tensor representations of
Brazilian Journal of Physics. Publicado em: 2010-06
-
6. Interatomic coulombic decay: a short review
The transition process of the interatomic Coulombic decay (ICD), is an electronic radiationless transition process, driving molecular complexes or clusters to a doubly ionized final state. This process differs from the Auger effect, because it takes place from a neutral monomer after the absorption of a released amount energy of the neighboring monomer in th
Brazilian Journal of Physics. Publicado em: 2009-09
-
7. Códigos de Goppa e Distâncias Generalizadas de Hamming / Goppa Codes and Generalized Hamming Weights
In this work, we study geometric Goppa codes and present several results on the so-called generalized Hamming distances. In the particular case of Hermitian codes we present precise results for the first, second and third generalized distances, for almost all Goppa codes supported on one point.
Publicado em: 2009
-
8. Metricas de Einstein e estruturas Hermitianas invariantes em variedades bandeira / Einstein metrics and invariant Hermitian structures on flag manifolds
In this work we and all the invariant Einstein metrics on four families of ag manifolds of type Bl and Cl. Our results are consistent with the finiteness conjecture of Einstein metrics proposed by Wang and Ziller. Our approach for solving the Einstein equations is based on the symmetries of the algebraic system. We obtain the Einstein algebraic systems for t
Publicado em: 2009
-
9. Oscilador de Dirac: ImplicaÃÃes da violaÃÃo da simetria de Lorentz e da massa dependente da posiÃÃo.
In this work we study the Dirac Oscillator (DO) in a threefold way. In the first way, we study DO with Lorentz symmetry violation. This violation is implemented through vectorial and an axial terms. We realize a non-relativistic limit and we obtain that the background vector field does not modify the energy spectrum. However, in the case of the background ax
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/07/2008
-
10. Sobre codigos hermitianos generalizados / On generalized hermitian codes
We study Goppa codes (GH codes) based on certain algebraic function fields whose number of rational places is large. These codes generalize the well-known Hermitian codes; thus we might expect that they have good parameters. Bulygin (IEEE Trans. Inform. Theory 52 (10), 46644669 (2006)) initiate the study of GH-codes; while he considered only the even chara
Publicado em: 2008
-
11. Encoding geometric Goppa codes via Grobner basis and codes on Norm-Trace curves / Codificação de certos codigos de Goppa geometricos utilizando a teoria de Bases de Grobner e codigos sobre a curva Norma-Traço
We extend results of Heegard, Little and Saints concerning the Gröbner basis algorithm for one-point Hermitian codes. We work with two-point and n-point Hermitian codes and codes arising from the Norm-Trace curve. We also determine the Weierstrass semigroup at a certain pair of rational points in such curves and uses these computations to improve the lower
Publicado em: 2008
-
12. Studies on Barlow points, Gauss points and Superconvergent points in 1D with Lagrangian and Hermitian finite element basis
In this work, we consider the superconvergence property of the finite element derivative for Lagrange's and Hermite's Family elements in the one dimensional interpolation problem. We also compare the Barlow points, Gauss points and Superconvergence points in the sense of Taylor's Series, confirming that they are not the same as believed before. We prove a no
Computational & Applied Mathematics. Publicado em: 2008