Universidad Autónoma del Estado de Hidalgo
Browsing Artículos indexados by Title
Now showing items 1-18 of 18
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A Proposal to Extend Duality in String Theory in Three Dimensions
(2011)The so calledWick duality of General Relativity in 2+1 dimensions with a cosmological constant is extended to the low energy effective action of bosonic string theory in 2+1 dimensions. Next we compose it with timelike T ... -
Una Conjetura de Polya y Szego para el Tono Fundamental de Membranas Poligonales
(2010)Polya y Szego conjeturaron que el n-polgono regular es capaz de producir el tono mas grave de entre los polgonos con n lados. La conjetura sigue abierta para todos los valores de n 5, despues de casi setenta a~nos de haber ... -
Efectos De Una Interacción No Conmutativa En La Radiación De Hawking
(2011)Discuto algunas posibles implicaciones de un modelo bidimensional para la evaporación de un agujero negro en una teoríade campo no conmutativa. La no conmutatividad que considero no afecta la gravedad pero juega un papel ... -
Eigenfunction expansions and spectral projections for isotropic elasticity outside an obstacle
(2004)We consider the operator ??? grad div acting on an exterior domain ? in Rn (with? >0 and n = 2, 3) subject to Dirichlet boundary conditions. The spectral resolution for the operator is written in terms of an expansion of ... -
Electroacupuncture improves gait locomotion, H-reflex and ventral root potentials of spinal compression injured rats.
(2017)This study explored the effect of electroacupuncture stimulation (EA) on alterations in the Hoffman reflex (H-reflex) response and gait locomotion provoked by spinal cord injury (SCI) in the rat. A compression lesion of ... -
Extended T-Duality In Three Dimensions
(2010)The concept of Wick duality of General Relativity in 2 + 1 dimensions with a cosmological constant is extended to the low energy effective action of bosonic string theory in 2 + 1 dimensions. We call this extension stringly ... -
FORMULANDO CONJETURAS MATEMÁTICAS EN ACTIVIDADES DE APRENDIZAJE ASISTIDAS CON TECNOLOGÍA
(2008)¿Qué tipo de actividades deberían incluir los programas de desarrollo profesional para revisar y ampliar los conocimientos matemáticos y pedagógicos de los profesores de bachillerato? Proponemos una ruta para involucrar a ... -
FÓRMULAS DE TIPO-WEYL PARA DOMINIOS EXTERIORES
(2003)Se presenta un recuento histórico de comportamientos asintóticos de tipo-Weyl para dominios exteriores -
HIGH SCHOOL TEACHERS COGNITIVE SCHEMES SHOWN IN PROBLEM SOLVING APPROACHES BASED ON THE USE OF TECHNOLOGY
(2007)This study documents the type of proof schemes that high school teachers developed and used in problem solving scenarios that involve the use of dynamic software (Cabri-Geometry). Research questions that helped organize ... -
International Journal of Pure and Applied Mathematics
(2008)I.M. Isaacs has proven a very interesting theorem concerning solvability of polynomials by real radicals. His result deals with an irreducible polynomial over the field of rational numbers which has a real radical element ... -
Luminescent polystyrene films, a novel way to reduce styrofoam residues
(2015)Polystyrene (PS) films doped with blue, yellow and red organic pigments have been deposited on glass and on commercial LED chips by spray pyrolysis using recycled PS as precursor, at deposition rates between 100 and 200 ... -
MATHEMATICAL THINKING, CONCEPTUAL FRAMEWORKS: A REVIEW OF STRUCTURES FOR ANALYZING PROBLEM-SOLVING PROTOCOLS
(2010)Recently, it has been considered important to reflect on the coincidences between the mathematical thinking of the School of Mathematics and the Discipline of Mathematics. It is widely accepted that a professional mathematician ... -
Mathematical thinking, conceptual frameworks: a review of structures for analyzing problema- solving protocols
(2010)Recently, it has been considered important to reflect on the coincidences between the mathematical thinking of the School of Mathematics and the Discipline of Mathematics. It is widely accepted that a professional mathematician ... -
Multichannel Detrended Fluctuation Analysis Reveals Synchronized Patterns of Spontaneous Spinal Activity in Anesthetized Cats
(2011)The analysis of the interaction and synchronization of relative large ensembles of neurons is fundamental for the understanding of complex functions of the nervous system. It is known that the temporal synchronization of ... -
PROCESOS DE DISEÑO E IMPLEMENTACIÓN DE TAREAS DE APRENDIZAJE MATEMÁTICO CON ALTA DEMANDA COGNITIVA
(2011)Resumen. Las tareas de aprendizaje son un elemento fundamental para que los estudiantes construyan conocimiento matemático. Sin embargo, una tarea por sí sola no basta para que los estudiantes logren un entendimiento ... -
RADICAL EXTENSIONS AND CROSSED HOMOMORPHISMS
(2001)If Q./F is a Galois extension with Galois group G and /x(fi) denotes the group of roots of unity in Q, we use the group Z1{G,fi(Q)) of crossed homomorphisms to study radical extensions inside Q. Furthermore, we characterise ...