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Mostrando ítems 11-17 de 17
Ponencia
On surfaces in digital topology
(1995)
In R. Ayala, E. Domínguez, A.R. Francés, A. Quintero, J. Rubio. A Polyhedral Approach to Digital Topology a new framework for digital topology has been proposed. This framework offers the possibility of transfering, in an ...
Tesis Doctoral
Subvariedades Slant en variedades de contacto
(1998-05-19)
Las subvariedades slant constituyen un importante caso intermedio entre las subvariedades invariantes y anti-invariantes. De hecho, diremos que una subvariedad M, tangente al campo de estructura Ԑ de una variedad casi-contacto ...
Artículo
On ξ-conformally flat contact metric manifolds
(Indian National Science Academy, 1997-06)
In this paper, the notion of ξ-conformally flat on a contact metric structure is introduced and it is proved that any K-contact metric manifold is ξ-conformally flat if and only if it is an η-Einstein Sasakian manifold. ...
Artículo
Análisis de errores en la conceptualización y simbolización de ecuaciones diferenciales en alumnos de química
(Grupo editorial Iberoamérica, 1996-08)
Este artículo recoge un análisis de los errores más frecuentes cometidos por estudiantes de Matemáticas de 2° curso de la Licenciatura de Química (Universidad de Sevilla, España) en el trabajo con Ecuaciones Diferenciales ...
Artículo
On the locally finite chain algebra of a proper homotopy type
(Belgian Mathematical Society, 1996)
In the classical paper [A-H] Adams-Hilton constructed a free chain algebra which is an important algebraic model of a simply connected homotopy type. We show that this chain algebra (endowed with an additional structure ...
Artículo
Lusternik-Schnirelmann invariants in proper homotopy theory
(University of California, 1992)
We introduce and study proper homotopy invariants of the Lusternik-Schnirelmann type, p-cat (-), p-Cat(-), and cat e(-) in the category of Γ2-locally compact spaces and proper maps. As an application, Rn (n Φ 3) is ...
Artículo
A note on the homotopical characterization of Rn
(Universitat de Barcelona, 1992)
This note gives conditions which assure that the one-point compactification of an open manifold is a manifold. This result is used to show that the homotopical characterization of Rn (n ≥ 4) can be derived from the Poincaré ...