Listar MAT_Articles por fecha de publicación
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Astrometria de asteroides en el Observatorio Astronómico de Valencia
Instituto Geográfico Nacional (1987)Con el propósito de participar en el programa internacional de observación de asteroides seleccionados, que coordina el Instituto de Astronomía Teórica de Leningrado (1), así como aportar datos de posiciones observadas de ... -
Figures of equilibrium in close binary systems
Kluwer Academic Publishers (1992-12)The equilibrium configurations of close binary systems are analyzed. The autogravitational, centrifugal and tidal potentials are expanded in Clairaut's coordinates. From the set of the total potential angular terms an ... -
Some new results on the Chu duality of discrete groups
Springer Verlag (2005)This paper deals mainly with the Chu duality of discrete groups. Among other results, we give sufficient conditions for an FC group to satisfy Chu duality and characterize when the Chu quasi-dual and the Takahashi ...
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Moscow spaces and selection theory
Elsevier (2008)A well-known result on Moscow spaces states that every G<sub>δ</sub>-dense subset of a Moscow space X is C-embedded in X. We present here the selection version of this result and also (by means of two different approaches) ...
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Stability numbers in K-contact manifolds
Elsevier (2008)The aim of this paper is to study the stability of the characteristic vector field of a compact K-contact manifold with respect to the energy and volume functionals when we consider on the manifold a two-parameter variation ...
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Structure of finite groups under certain arithmetical conditions on class sizes
Elsevier (2008)Let G be a finite solvable group. We assume that the set of conjugacy class sizes of G is {1, m, n, m k} with m and n coprime positive integers greater than 1 and k a divisor of n. Then we obtain several properties on the ...
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Corrigendum to "Variations on a theorem by Alan Camina on conjugacy class sizes" [J. Algebra 296 (2006) 253-266]
Elsevier (2008)[No abstract available]
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Integration rules from the equivalent differential equation method applied to equations of motion
Elsevier (2008)The numerical integration of equations of motion necessarily implies the presence of errors that depend on initial conditions as well as the different physical parameters under consideration. More particularly, dumping or ...
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Semi-analytical integration algorithms based on the use of several kinds of anomalies as temporal variable
Elsevier (2008)One of the main problems in celestial mechanics is the management of long developments in Fourier or Poisson series used to describe the perturbed motion in the planetary system. In this work we shall develop a software ...
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Analysis of multiple waveforms by means of functional principal component analysis: normal versus pathological patterns in sit-to-stand movement
Springer Verlag (2008)This paper presents an application of Functional Principal Component Analysis (FPCA) to describe inter-subject variability of multiple waveforms. This technique was applied to the study of sit-to-stand movement in two ...
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Generating sequences and Poincaré series for a finite set of plane divisorial valuations
Elsevier (2008)Let V be a finite set of divisorial valuations centered at a 2- dimensional regular local ring R. In this paper we study its structure by means of the semigroup of values, SV , and the multi-index graded algebra defined ...
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The Bohr topology of discrete non abelian groups
Heldermann Verlag (2008)We look at finitely generated Bohr groups G# (groups G equipped with the topology inherited from their Bohr compactification bG). Among others, the following results are proved: every finitely generated group without free ...
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Representation and approximation by series of continuous functions
Springer Verlag (2008)Let X be a topological space and let C (X) be the ring of all real-valued continuous functions defined on X. In this paper, we study the representation and approximation of continuous functions by sums of infinite series. ...
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On the Linear Stability of Splitting Methods
Springer Verlag (2008)A comprehensive linear stability analysis of splitting methods is carried out by means of a 2 × 2 matrix K(x) with polynomial entries (the stability matrix) and the stability polynomial p(x) (the trace of K(x) divided by ...
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δ-Sequences and Evaluation Codes de ned by Plane Valuations at Infinity
Oxford University Press (2008)We introduce the concept of δ-sequence. A δ-sequence ∆ generates a well-ordered semigroup S in Z2 or R. We show how to construct (and compute parameters) for the dual code of any evaluation code associated with a weight ...
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Splitting and composition methods in the numerical integration of differential equations
Sociedad Española de Matemática Aplicada (2008)We provide a comprehensive survey of splitting and composition methods for the numerical integration of ordinary differential equations (ODEs). Splitting methods constitute an appropriate choice when the vector field ...
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On balancedness and D-Completeness of the space of Semi-lipschitz functions
Springer Verlag (2008)Let (X, d) be a quasi-metric space and (Y, q) be a quasi-normed linear space. We show that the normed cone of semi-Lipschitz functions from (X, d) to (Y, q) that vanish at a point x0 E X, is balanced. Moreover, it is ...
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Shape Descriptors for classification of functional data
American Statistical Association (2008)Curve discrimination is an important task in engineering and other sciences. We propose several shape descriptors for classifying functional data, inspired by form anal- ysis from the image analysis eld: statistical ...
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Ultrafilters and non-Cantor minimal sets in linearly ordered dynamical systems
Springer Verlag (2008)It is well known that infinite minimal sets for continuous functions on the interval are Cantor sets; that is, compact zero dimensional metrizable sets without isolated points. On the other hand, it was proved in Alcaraz ...
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Bott Integrable Hamiltonian Systems on S2 x S1
American Institute of Mathematical Sciences (2008)In this paper, we study the topology of Bott integrable Hamiltonian flows on S2 × S1 in terms of some types of periodic orbits, called NMS periodic orbits. The set of these periodic orbits can be identified by means ...
