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Mostrando ítems 1-10 de 59
Ponencia
On the computability of the p-local homology of twisted cartesian products of Eilenberg-Mac Lane spaces
(Universidade do Minho, 1997)
Working in the framework of the Simplicial Topology, a method for calculating the p-local homology of a twisted cartesian product X( , m, , 0, n) = K( ,m)× K( 0, n) of Eilenberg-Mac Lane spaces is given. The chief ...
Tesis Doctoral
Sobre las componentes irreducibles de la variedad de leyes de álgebra de Lie nilpotentes complejas de dimensión 8
(1992)
En el presente trabajo se expone el desarrollo de un método para el tratamiento efectivo de los problemas que se presentan en el estudio de la variedad Nn, junto con los desarrollos teóricos necesarios, y su aplicación a ...
Tesis Doctoral
El tamaño de un grafo sin subgrafos homeomorfos a un grafo completo
(1998)
"Desde el origen de la Teoría de Grafos Extremales, uno de los problemas más generales que pueden plantearse en este campo, es estudiar los grafos de manera que podamos encontrar condiciones para que contengan o no a un ...
Ponencia
Anchura de un convexo en la esfera.
(1997-01)
Se generaliza el concepto de anchura de un conjunto en el plano a la superficie de la esfera, dando condiciones necesarias y suficientes para que un conjunto convexo sobre la superficie de la esfera puede pasar a través ...
Artículo
On Sedlacek's C-Graphs
(Societatea de Științe Matematice din România, 1993)
In this Note, we study some properties of Sedlacek's C-graphs (see [3], [4] and [5]). In particular, we give new methods to build infinite families of C-graphs starting by a C-graph, and we study the relationship between ...
Ponencia
Homological perturbation theory and computability of Hochschild and cyclic homologies of CDGAs
(Diffiety Institute of the Russian Academy of Natural Sciences, 1997)
We establish an algorithm computing the homology of commutative differential graded algebras (briefly, CDGAs). The main tool in this approach is given by the Homological Perturbation Theory particularized for the algebra ...
Artículo
Triangle-Free Planar Graphs as Segments Intersection Graphs
(1999)
We prove that every triangle-free planar graph is the graph of intersection of a set of segments in the plane. Moreover, the segments can be chosen in only three directions (horizontal, vertical and oblique) and in such a ...
Artículo
The center of an infinite graph
(1996)
In this note we extend the notion of the center of a graph to infinite graphs. Thus, a vertex is in the center of the infinite graph G if it is in the center of an increasing family of finite subgraphs covering G. We give ...
Artículo
On p-minimal homological models of twisted tensor products of elementary complexes localised over a prime
(American Mathematical Society, 1999)
In this paper, working over Z(p) and using algebra perturbation results from [18], p-minimal homological models of twisted tensor products (TTPs) of Cartan’s elementary complexes are obtained. Moreover, making use of the ...
Ponencia
Diameter of a set on the cylinder
(Queen's University, 1997)