Group Of Isometries
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Group of Isometries of Niederreiter-Rosenbloom-Tsfasman Block Space
RESUMO Seja P = 1 , 2 , . . . , n , ≤ um conjunto parcialmente ordenado dado por uma união disjunta de cadeias de mesmo comprimento e V = F q N o espaço vetorial das N-uplas sobre o corpo finito F q. Seja V = V 1 × V 2 × . . . × V n um produto direto de V, em blocos de subespaços V i = F q k i com k 1 + k
TEMA (São Carlos). Publicado em: 2020-08
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2. Aspects of nonmetricity in gravity theories
In this work, we show that a class of metric-affine gravities can be reduced to a Riemann-Cartan one. The reduction is based on the cancelation of the nonmetricity against the symmetric components of the spin connection. A heuristic proof, in the Einstein-Cartan formalism, is performed in the special case of diagonal unitary tangent metric tensor. The result
Brazilian Journal of Physics. Publicado em: 2010-12
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3. POLITOPOS DE GOSSET E OS GRUPOS DE COXETER E(N) / GOSSET POLYTOPES AND THE COXETER GROUPS E(N)
A convex polytope is semiregular if all its faces are regular and the group of isometries acts transitively over vertices. The classification of semiregular polytopes includes a few infinite families, some low dimensional exceptions and a family, the Gosset polytopes, which is defined for dimension 3 to 8. Certain groups of isometries of R(n) generated by re
Publicado em: 2010
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4. O Grupo de isometrias de uma árvore n-ária e endomorfismos
Consideramos Tn uma árvore regular uni-raiz de valÊncia n 2, A seu grupo de isometrias e G(n) o subgrupo de A das isometrias finitárias, onde uma isometria é dita finitária se ela é uma extensão rígida de uma permutação de um determinado nível. Estudamos em alguns detalhes a estrutura de G(n). Descrevemos, de maneira indutiva, como produzir repres
Publicado em: 2008
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5. Discrete Geometry and Codes / Geometria discreta e codigos
The research developed here is related and inspired by problems in coding theory. It is presented in two parts. In the first we focus on the search for the minimum nonvanishing vector of a lattice, specially in the case of a projection of the ndimensional integer lattice in the direction of one of its vectors. This is a problem of high computational complexi
Publicado em: 2007
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6. Discrete Geometry and Codes / Geometria discreta e codigos
The research developed here is related and inspired by problems in coding theory. It is presented in two parts. In the ?rst we focus on the search for the minimum nonvanishing vector of a lattice, specially in the case of a projection of the ndimensional integer lattice in the direction of one of its vectors. This is a problem of high computational complexit
Publicado em: 2007
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7. Conserved gravitational charges, locality and the holographic weyl anomaly: a fresh viewpoint
Since the proposal of the AdS/CFT correspondence, made by Maldacena and Witten, there has been some controversy about the definition of conserved Noether charges associated with asymptotic isometries in asymptotically AdS spacetimes, namely, whether they form an anomalous (i.e., a nontrivial central extension) representation of the Lie algebra of the conform
Brazilian Journal of Physics. Publicado em: 2005-12
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8. REPRESENTATIONS OF TRIANGLE GROUPS IN COMPLEX HYPERBOLIC / REPRESENTAÇÕES DE GRUPOS TRIANGULARES EM GEOMETRIA HIPERBÓLICA COMPLEXA
The main aim of this work is to study type-preserving representations p: gamma PU(2, 1) of triangle groups _ in the group of holomorphic isometries of the twodimensional complex hyperbolic space H2C. The triangle group gamma(p, q, r) is the group generated by reflections in the sides of a geodesic triangle having angles pi/p, pi/q and pi/r. We focus our atte
Publicado em: 2003
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9. THURSTON GEOMETRIES AND SEIFERT FIBER SPACES / GEOMETRIAS DE THURSTON E FIBRADOS DE SEIFERT
We begin by studying orbifolds, i.e., topological spaces locally homeomorphic to quotients of Rn by finite groups. Then we study Seifert fiber spaces of dimension three which are certain type of foliations by circles that can be seen as fiber bundles over orbifolds. This material is useful in the subsequent study of Thurston model geometries. A Thurston mode
Publicado em: 2003
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10. Hipersuperficies de coomogeneidade um na esfera euclidiana
In 1994, Podestà and Spiro proved that a compact hypersurface of cohomogeneity one, f : Mn + IRn+1, n _ 4, whose principal orbits are umbilical in M is a hyper surface ofrevolution. In 1996, in his Ph.D. thesis, Seixas weakened the hypothesis of this theorem, proving the result for complete hypersurfaces and extended the result of Podestà and Spiro to the
Publicado em: 2002
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11. Surfaces in E³ invariant under a one parameter group of isometries of E³
We develop a convenient surface theory in E³ in order to apply it to the class of the surfaces invariant under a one-parameter group of isometries of E³. In this way we derive intrinsic characterizations along with several results of subclasses of this class of surfaces that satisfy certain preassigned properties. In the process all results are also effort
Anais da Academia Brasileira de Ciências. Publicado em: 2000-06
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12. Sobre simetrias e ornamentos
This objective of this work is to study symmetries and the groups of symmetries of ornaments. Firstly, the isometries of the plane (translation, rotation, reflection and glide reflection), the cyclical and dihedral groups and the translation s group are studied. After, the classification of the discrete symmetry groups of the plane is presented: Cn and Dn, t
Publicado em: 1999