Buscar
Mostrando ítems 1-10 de 17
Artículo
Submanifolds weakly associated with graphs
(Indian Academy of Sciences, 2009-06)
We establish an interesting link between differential geometry and graph theory by defining submanifolds weakly associated with graphs. We prove that, in a local sense, every submanifold satisfies such an association, and ...
Artículo
On the existence of almost contact structure and the contact magnetic field
(Springer, 2009-10)
In this short note we give a simple proof of the existence of an almost contact metric structure on any orientable 3-dimensional Riemannian manifold (M3, g) with the prescribed metric g as the adapted metric of the almost ...
Artículo
Submanifolds of generalized Sasakian space forms
(Mathematical Society of the Republic of China, 2009-06)
In the present paper submanifolds of generalized Sasakian-spaceforms are studied. We focus on almost semi-invariant submanifolds, these generalize invariant, anti-invariant, and slant submanifolds. Sectional curvatures, ...
Artículo
One-relator groups and proper 3-realizability
(European Mathematical Society, 2009)
How different is the universal cover of a given finite 2-complex from a 3-manifold (from the proper homotopy viewpoint)? Regarding this question, we recall that a finitely presented group G is said to be properly 3-realizable ...
Artículo
Rigidity of pseudo-isotropic immersions
(Elsevier, 2009-07)
Several notions of isotropy of a (pseudo)Riemannian manifold have been introduced in the literature, in particular, the concept of pseudo-isotropic immersion. The aim of this paper is to look more closely at this notion ...
Artículo
Diofanto, Hilbert y Robinson: ¿Alguna relación entre ellos?
(Sociedad Canaria Isaac Newton de Profesores de Matemáticas, 2009-04)
A lo largo de la Historia son bastantes los matemáticos a los que no se les ha valorado su contribución. Éste es el caso de muchas mujeres matemáticas, que han realizado importantes trabajos pero cuyo reconocimiento no ha ...
Artículo
Artículo
An algorithm to compute abelian subalgebras in linear algebras of upper-triangular matrices
(American Institute of Physics, 2009)
This paper deals with the maximal abelian dimension of the Lie algebra hn, of nxn upper-triangular matrices. Regarding this, we obtain an algorithm which computes abelian subalgebras of hn as well as its implementation ...
Artículo
Computational algorithm for obtaining Abelian subalgebras in Lie algebras
(World Academy of Science, Engineering and Technology, 2009)
The set of all abelian subalgebras is computationally obtained for any given finite-dimensional Lie algebra, starting from the nonzero brackets in its law. More concretely, an algorithm is described and implemented to ...
Ponencia
¿Alcanzaría siquiera a pensar Hilbert que la resolución del décimo de los problemas por él planteados podría venir de la mano de una mujer? : Julia Robinson
(Unidad para la Igualdad, Universidad de Sevilla, 2009)
La educación femenina a finales del siglo XIX y principios del XX estaba muy abandonada en casi todos los países y de manera mucho más acusada en España. Fuera del aprendizaje de las “cuatro reglas”, el acceso de la mujer ...