995 resultados para laura algebras


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Tesis (Doctor en Ciencias con Orientación en Morfología) U.A.N.L., 2006.

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Tesis (Doctor en Ciencias Sociales con Orientación en Desarrollo Sustentable) U.A.N.L., 2006

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La photographie, le rêve de pouvoir reproduire en série une image, la perte de l'idée d'orginal. Tous les tirages que je peux donner à mes proches sont authentiques. La copie n'existe par; la pellicule l'empêche. [...]

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Mathematicians who make significant contributions towards development of mathematical science are not getting the recognition they deserve, according to Cusat Vice Chancellor Dr. J. Letha. She was delivering the inaugural address at the International Conference on Semigroups, Algebras and Applications (ICSA 2015) organized by Dept. of Mathematics, Cochin university of Science and Technology on Thursday. Mathematics plays an important role in the development of basic science. The academic community should not delay in accepting and appreciating this, Dr. Letha added. Dr. Godfrey Louis, Dean, Faculty of Science presided over the inaugural function. Prof. P. G. Romeo, Head, Dept. of Mathematics, Prof. John C. Meakin, University of Nebraska-Lincoln, USA, Prof. A. N. Balchand, Syndicate Member, Prof. K. A. Zakkariya, Syndicate Member, Prof. A. R. Rajan, Emeritus Professor, University of Kerala and Prof. A. Vijayakumar, Dept. of Mathematics, Cusat addressed the gathering. Around 50 research papers will be presented at the Conference.Prof. K. S. S. Nambooripad, the internationally famous mathematician with enormous contributions in the field of semigroup theory, who has attained eighty years of age will be felicitated on 18th at 5.00 pm during a function presided over by Dr. K. Poulose Jacob, Pro-Vice Chancellor. Dr. Suresh Das, Executive President, KSCSTE, Dr. A. M. Mathai, Director, CMSS and President, Indian Mathematical Society, Dr. P. G. Romeo, Head, Dept. of Mathematics and Dr. B. Lakshmi, Dept. of Mathematics will speak on the occasion.

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Let E be a number field and G be a finite group. Let A be any O_E-order of full rank in the group algebra E[G] and X be a (left) A-lattice. We give a necessary and sufficient condition for X to be free of given rank d over A. In the case that the Wedderburn decomposition E[G] \cong \oplus_xM_x is explicitly computable and each M_x is in fact a matrix ring over a field, this leads to an algorithm that either gives elements \alpha_1,...,\alpha_d \in X such that X = A\alpha_1 \oplus ... \oplusA\alpha_d or determines that no such elements exist. Let L/K be a finite Galois extension of number fields with Galois group G such that E is a subfield of K and put d = [K : E]. The algorithm can be applied to certain Galois modules that arise naturally in this situation. For example, one can take X to be O_L, the ring of algebraic integers of L, and A to be the associated order A(E[G];O_L) \subseteq E[G]. The application of the algorithm to this special situation is implemented in Magma under certain extra hypotheses when K = E = \IQ.

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A large class of special functions are solutions of systems of linear difference and differential equations with polynomial coefficients. For a given function, these equations considered as operator polynomials generate a left ideal in a noncommutative algebra called Ore algebra. This ideal with finitely many conditions characterizes the function uniquely so that Gröbner basis techniques can be applied. Many problems related to special functions which can be described by such ideals can be solved by performing elimination of appropriate noncommutative variables in these ideals. In this work, we mainly achieve the following: 1. We give an overview of the theoretical algebraic background as well as the algorithmic aspects of different methods using noncommutative Gröbner elimination techniques in Ore algebras in order to solve problems related to special functions. 2. We describe in detail algorithms which are based on Gröbner elimination techniques and perform the creative telescoping method for sums and integrals of special functions. 3. We investigate and compare these algorithms by illustrative examples which are performed by the computer algebra system Maple. This investigation has the objective to test how far noncommutative Gröbner elimination techniques may be efficiently applied to perform creative telescoping.

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Violencia y seguridad ciudadana: algunas reflexiones, es una obra de divulgación científica que hace parte de la Colección Frontera, una línea editorial en la que convergen los esfuerzos de la Facultad Latinoamericana de Ciencias Sociales, (Flacso-Ecuador), y el Centro Internacional de Investigaciones para el Desarrollo, (IDRC-CRDI) por trascender la mirada nacionalista que ha recaído sobre las fronteras y rescatar las dinámicas y demandas locales que han sido ignoradas tanto en la producción de conocimiento como en la formulación e implementación de políticas públicas de seguridad ciudadana. El libro constituye un estado del arte sobre el concepto de seguridad ciudadana en Ecuador y su articulación con el diseño de políticas públicas en esta materia.

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El artículo forma parte de un dossier titulado: El sistema educativo alemán

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Laura siempre ha querido tener alguien especial para compartir sus secretos. Una noche se encuentra una estrella rota en la acera. Toma la estrella en su mano,la lleva a su habitación, la remienda, y la coloca sobre su almohada. Le cuenta a la estrella todos sus secretos, pero cuando despierta a la mañana siguiente, la estrella ha desaparecido.

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Resumen tomado del autor. Resumen en castellano e inglés. Notas a pie de página. Este artículo se incluye en el monográfico 'El aprendizaje: nuevas aportaciones'

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Primer premio Concurso Nacional Leer y Escribir, 1983, del Ministerio de Cultura