Browsing Matemática by Title
Now showing items 153-172 of 232
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Quadratic Hamiltonians in phase-space quantum mechanics
(1989-07)The dynamical evolution is described within the phase-space formalism by means of the Moyal propagator, which is the symbol of the evolution operator. Quadratic Hamiltonians on the phase space are distinguished in that ... -
Quadratic variation for cylindrical martingale-valued measures
(2023)This article focuses in the definition of a quadratic variation for cylindrical orthogonal martingale-valued measures defined on Banach spaces. Sufficient and necessary conditions for the existence of such a quadratic ... -
Quantum electrodynamics in external fields from the spin representation
(1994-07)Systematic use of the infinite-dimensional spin representation simplifies and rigorizes several questions in quantum field theory. This representation permutes "Gaussian" elements in the fermion Fock space, and is necessarily ... -
Quantum gauge models without classical Higgs mechanism
(2010-09-15)We examine the status of massive gauge theories, such as those usually obtained by spontaneous symmetry breakdown, from the viewpoint of causal (Epstein-Glaser) renormalization. The BRST formulation of gauge invariance in ... -
Quantum symmetry groups of noncommutative spheres
(2001-08)We show that the noncommutative spheres of Connes and Landi are quantum homogeneous spaces for certain compact quantum groups. We give a general construction of homogeneous spaces which support noncommutative spin geometries. -
Quenched distributions for the maximum, minimum and local time of the Brox diffusion
(2021)After leaving fixed the environment, which is called the quenchend case, we give explicitly the distribution function of the maximum and the minimum of the Brox diffusion at first time it reaches a barrier. We also give ... -
Reconstruction of manifolds in noncommutative geometry
(2008-01-31)We show that the algebra A of a commutative unital spectral triple (A,H,D) satisfying several additional conditions, slightly stronger than those proposed by Connes, is the algebra of smooth functions on a compact spin manifold. -
Regularization of cylindrical processes in locally convex Spaces
(2020-12-15)Let Φ be a locally convex space and let Φ′ denote its strong dual. In this paper, we introduce sufficient conditions for the existence of a continuous or a càdlàg Φ′-valued version to a cylindrical process defined on Φ′. ... -
Relativistic quantum kinematics in the Moyal representation
(1990-03)In this paper, we obtain the phase-space quantization for relativistic spinning particles. The main tool is what we call a "Stratonovich-Weyl quantizer" which relates functions on phase space to operators on a suitable ... -
Las representaciones metapléctica y de espín de ciertos grupos de simetría: un estudio comparativo
(2021-09)Los espacios de Fock son una construcción algebraica utilizada en mecánica cuántica para construir el espacio de estados cuánticos de un número desconocido de partículas idénticas a partir de una sola partícula, que ... -
La representación de pin del grupo ortogonal infinitodimensional
(1994-02)Desarrollamos en detalle la representación de pin del grupo ortogonal infinitodimensional restringido. Esta es una representación proyectiva que permuta elementos "gaussianos" en el espacio de Fock fermiónico: nuestra ... -
Resolución de la ecuación de tercer grado por aproximaciones sucesivas
(1990)Se presenta un método numérico iterativo para encontrar las raíces reales de la ecuación de tercer grado reducida x^3 + Bx + C = 0. El método no requiere partir con un cálculo aproximado de la raíz. Las fórmulas de recurrencia ... -
Resolución de problemas matemáticos en GeoGebra
(2020)En este artículo se analizan y discuten las ventajas y oportunidades que ofrece GeoGebra durante el proceso de resolución de problemas. En particular, se analizan y documentan las formas de razonamiento matemático exhibidas ... -
Una retrospección a la matemática griega
(2000-12-01)Este artículo apareció originalmente en la revista cultural semestral Laberintos, publicado por el Instituto de Enseñanza Superior ÉLAIOS, de Zaragoza, en un número dedicado al Año Mundial de las Matemáticas (2000). ... -
REVISTA SERENGUETI 1(1)
(2019-02)La revista Serengueti es una revista digital dirigida a estudiantes de la carrera de Estadística, ya que su contenido puede ayudar a comprender conceptos, técnicas y métodos para el análisis de datos de diferente tipo. La ... -
REVISTA SERENGUETI 1(2)
(2019-12)Se destaca, de manera general, que la revista Serengueti se compone como una herramienta capaz de incentivar la participación estudiantil, en el cual principalmente se tiene como fin evidenciar y reconocer los esfuerzos ... -
REVISTA SERENGUETI 2(1)
(2020)En los últimos años, el estudiantado del Bachillerato en Estadística de nuestra escuela ha realizado trabajos con múltiples técnicas estadísticas, que se aplican a diversas áreas del conocimiento. Darnos cuenta de la riqueza ... -
Riemannian manifolds in noncommutative geometry
(2012-07)We present a definition of Riemannian manifold in noncommutative geometry. Using products of unbounded Kasparov modules, we show one can obtain such Riemannian manifolds from noncommutative spin^c manifolds; and conversely, ... -
Rotation-Based Mixed Formulations for an Elasticity-Poroelasticity Interface Problem
(2020)In this paper we introduce a new formulation for the stationary poroelasticity equations written using the rotation vector and the total fluid-solid pressure as additional unknowns, and we also write an extension to the ... -
S-matrix from the metaplectic representation
(1992-03)We show how the S-matrix for bosons in an external field can be derived directly from the infinite dimensional metaplectic representation, in terms of the classical scattering operator.