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Mostrando ítems 1-10 de 15
Artículo
Algebra of derivations of Lie algebras
(Elsevier, 2001)
We show a method to determine the space of derivations of any Lie algebra, and in particular we apply this method to a special class of Lie algebras, those nilpotent with low nilindex. Most calculations have been supported ...
Artículo
Logarithmic Comparison Theorem and some Euler homogeneous free divisors
(American Mathematical Society, 2005)
Let D, x be a free divisor germ in a complex manifold X of dimension n > 2. It is an open problem to find out which are the properties required for D, x to satisfy the so-called Logarithmic Comparison Theorem (LCT), ...
Artículo
Tutte uniqueness of locally grid graphs
(Departamento de Matemáticas CINVESTAV, 2004)
A graph is said to be locally grid if the structure around each of its vertices is a 3 × 3 grid. As a follow up of the research initiated in [4] and [3] we prove that most locally grid graphs are uniquely determined by ...
Artículo
The isoperimetric problem in complete annuli of revolution with increasing Gauss curvature
(Cambridge University Press, 2008)
In this work we describe the isoperimetric regions in complete symmetric annuli of revolution with Gauss curvature non-decreasing from the shortest parallel. This description allows us to complete the classification of ...
Artículo
Locating a Central Hunter on the Plane
(Springer, 2007)
Protection, surveillance or other types of coverage services of mobile points call for different, asymmetric distance measures than the traditional Euclidean, rectangular or other norms used for fixed points. In this ...
Artículo
A new condition for identifiability of finite mixture distributions
(Springer, 2006)
In this paper a sufficient condition for the identifiability of finite mixtures is given. This condition is less restrictive than Teicher’s condition (Teicher H, Ann Math Stat 34:1265–1269 (1963)) and therefore it can ...
Artículo
Algebra structure for Lp of a vector measure
(Elsevier, 2009)
In this paper, we present new results about the space Lp (ν) for ν being a vector measure defined in the Borel σ -algebra of a compact abelian group G and satisfying certain property concerning translation of simple ...
Artículo
Maximizing Trip Coverage in the Location of a Single Rapid Transit Alignment
(Springer, 2005)
This article describes several heuristics for the construction of a rapid transit alignment. The objective is the maximization of the total origin-destination demand covered by the alignment. Computational results show ...
Artículo
On the isoperimetric problem in Euclidean space with density
(Springer, 2008)
We study the isoperimetric problemfor Euclidean space endowedwith a continuous density. In dimension one, we characterize isoperimetric regions for a unimodal density. In higher dimensions, we prove existence results and ...
Artículo
Least-perimeter Partitions of the Disk into Three Regions of Given Areas
(Indiana University Mathematics Department, 2004)
We prove that the unique least-perimeter way of partitioning the unit 2-dimensional disk into three regions of prescribed areas is by means of the standard graph described in Figure 1.