Polynomial Rings
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Research on Free Vibration Frequency Characteristics of Rotating Functionally Graded Material Truncated Conical Shells with Eccentric Functionally Graded Material Stringer and Ring Stiffeners
Abstract In this research work, an exact analytical solution for frequency characteristics of the free vibration of rotating functionally graded material (FGM) truncated conical shells reinforced by eccentric FGM stringers and rings has been investigated by the displacement function method. Material properties of shell and stiffeners are assumed to be graded
Lat. Am. j. solids struct.. Publicado em: 2016
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2. A THEORETICAL EVALUATION OF ELECTROCONDUCTIVE PROPERTIES FOR [1,2,4]-TRIAZOLE 4N-SUBSTITUTED POLYMERS
In order to evaluate a set of electrical and optical properties by using time-dependent density functional theory (TD-DFT), at level of theory B3LYP/6-31G(d), the 4N-substituted [1,2,4]-Triazole (TAZ) oligomers and substituted derivatives were studied using cyano, amino, methyl and fluoro functional groups. Additionally, specific properties were theoretic
Quím. Nova. Publicado em: 2015-06
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3. Half-factoriality in subrings of trigonometric polynomial rings
Polinômios trigonométricos são amplamente utilizados em diferentes áreas de engenharia e ciências. Inspirado por suas aplicações, investigamos domínios semi-fatorial em anéis de polinômios trigonométricos. Nós construímos o domínios semi-fatoriais T'2, T'3 e T'4 que são os subanéis do anel de complexos, polinômios trigonométricas T', de tal
TEMA (São Carlos). Publicado em: 04/10/2013
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4. Identidades polinomiais em álgebras matriciais sobre a álgebra de Grassmann / Polynomial identities in matrix algebras over the Grassmann algebra
Nesta tese estudamos a álgebra genérica de M1;1 em dois geradores sobre um corpo infinito de característica diferente de 2. Descrevemos o centro desta álgebra e provamos que este é a soma direta do corpo com um ideal nilpotente da álgebra. Como consequência mostramos que este centro contém elementos não escalares, respondendo a uma pergunta feita po
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/03/2012
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5. Encoding through generalized polynomial codes
This paper introduces novel constructions of cyclic codes using semigroup rings instead of polynomial rings. These constructions are applied to define and investigate the BCH, alternant, Goppa, and Srivastava codes. This makes it possible to improve several recent results due to Andrade and Palazzo [1].
Computational & Applied Mathematics. Publicado em: 2011
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6. Prime ideals in polinomial rings in several indeterminates
If P is a prime ideal of a polynomial ring K[x], where K is a field, then P is determined by an irreducible polynomial in K[x]. The purpose of this paper is to show that any prime ideal of a polynomial ring in n-indeterminates over a not necessarily commutative ring R is determined by its intersection with R plus n polynomials.
Publicado em: 2011
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7. A note on jacobson rings and polynomial rings
As is well known, if R is a ring in which every prime ideal is an intersection of primitive ideals, the same is true of R[X] . The purpose of this paper is to give a general theorem which shows that the above result remains true when rnany other classes of prime ideals are considered in place of prirnitive ideals.
Publicado em: 2011
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8. Sobre a existencia de bases SAGBI finitas para o nucleo de k-derivações em k[x1,...,xn] / About the existence of finite SAGBI bases for the kernel of a k-derivation in k[x1,...,xn]
The general objective of this work is to understand the SAGBI bases theory from a structural point of view, seeking criterias for its existence and results that prove its effitiency in the study of certain subalgebras of k[x], as well as to study the general theory of derivations over polynomial rings, its localizations and quotients, in order to explo
Publicado em: 2008
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9. Codigos ciclicos sobre aneis locais e suas relações com a transformada discreta de Fourier / Cyclics codes on local rings and its relations with the discrete transformed of Fourier
In this research we present some existing relationships between cyclic codes and discrete Fourier transform both local rings. For this, it is necessary to identify the groups of unit associated with each corresponding local ring. As a consequence, cyclic codes over these rings may be constructed. Next, we construct sequence generators by use of linear feedba
Publicado em: 2007
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10. Sobre derivações localmente nilpotentes dos aneis K[x,y,z] e K[x,y] / Over locally nilpotent derivations of the rings K[x,y,z] e K[x,y]
In this dissertation we present centraIs results on locally nilpotents derivations in a ring of polynomials B = k[x1, ..., xn], for n ≤ 3, which were presented by Daniel Daigle in [2], [3] and [4]. For this, we introduce basic fundamenta1 results of the theory of derivations in a ring and we present results on locally nilpotents derivations in a domain
Publicado em: 2007
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11. Teoria dos mÃdulos idealizadores diferenciais
Given an ideal in a polynomial ring (with coefficients in a field usually assumed to have characteristic zero), we may consider the derivations that preserve it. They give rise to a special module called differential idealizer (of the given ideal). Such an object plays a primordial role in this thesis, which is divided into two main sections. In the first se
Publicado em: 2006
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12. Identidades polinomiais em algebras T-primas / Polynomial identities in T-prime algebras
In this work we study tensor products of T-prime T-ideals over infinite fields. The behaviour of these tensor products over a field of characteristic zero was described by Kemer. First we show, using methods due to Regev, that such a description holds if one restricts oneself to multilinear polynomials only. Second, applying graded polynomial identities, we
Publicado em: 2005