Buscar
An efficient algorithm to compute the exponential of skew-Hermitian matrices for the time integration of the Schrödinger equation
(Elsevier B.V., 2022-04-30)
We present a practical algorithm to approximate the exponential of skew-Hermitian matrices up to round-off error based on
an efficient computation of Chebyshev polynomials of matrices and the corresponding error analysis. ...
Design of a Mathematica package to develop the product of some spherical functions as linear combinations of themselves
(Wiley, 2019-09)
Results obtained when solving problems about atomic physics and about the potential theory show an almost spherical symmetry. These solutions can only be expressed in an exact form on a few occasions, so turning to ...
H5P: crear, compartir, evaluar, reutilizar, etc.
(Instituto Nacional de Tecnologías Educativas y de Formación del Profesorado (INTEF), 2022-06-28)
Desde la introducción de las tecnologías de información y comunicaciones en el aula, una de las preocupaciones de la docencia era encontrar entornos para la creación, realización y evaluación de actividades educativas. Eso ...
Symplectic integrators for second-order linear non-autonomous equations
(Elsevier, 2018-03)
Two families of symplectic methods specially designed for second-order time-dependent linear systems are presented. Both are obtained from the Magnus expansion of the corresponding first-order equation, but otherwise they ...
Two algorithms to construct a consistent first order theory of equilibrium figures of close binary systems
(Elsevier, 2016-12)
One of the main problems in celestial mechanics is the study of the shape adopted by extended deformable celestial bodies in its equilibrium configuration. In this paper, a new point of view about classical theories on ...
Archetypal analysis for ordinal data
(Elsevier Inc., 2021-08-03)
Archetypoid analysis (ADA) is an exploratory approach that explains a set of continuous observations as mixtures of pure (extreme) patterns. Those patterns (archetypoids) are actual observations of the sample which makes ...
High-order commutator-free quasi-Magnus exponential integrators for non-autonomous linear evolution equation
(Elsevier, 2017-11)
The class of commutator-free quasi-Magnus (CFQM) exponential integrators provides a favourable alternative to standard Magnus integrators, in particular for large-scale applications arising in the time integration of ...
Nonlinear diameter preserving maps on function spaces
(Taylor & Francis, 2020-01-01)
In this paper we study nonlinear diameter preserving mappings defined between function spaces and obtain generalizations of, basically, all known results concerning diameter preservers. In particular, we give a complete ...
The log-canonical threshold of a plane curve
(Cambridge University Press, 2016-05)
We give an explicit formula for the log-canonical threshold of a reduced germ of plane
curve. The formula depends only on the first two maximal contact values of the branches
and their intersection multiplicities. We ...
The Lie-group method based on radial basis functions for solving nonlinear high dimensional generalized Benjamin–Bona–Mahony–Burgers equation in arbitrary domains
(Elsevier, 2018-03-15)
The aim of this paper is to introduce a new numerical method for solving the nonlinear generalized Benjamin–Bona–Mahony–Burgers (GBBMB) equation. This method is combination of group preserving scheme (GPS) with radial basis ...