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Search Results: 1 - 10 of 272 matches for " Rigoberto "
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Accurate solution estimates for vector difference equations
Rigoberto Medina
International Journal of Mathematics and Mathematical Sciences , 2003, DOI: 10.1155/s016117120321022x
Abstract: Accurate estimates for the norms of the solutions of a vector difference equation are derived. They give us stability conditions and bounds for the region of attraction of the stationary solution. Our approach is based on estimates for the powers of a constant matrix. We also discuss applications of our main results to partial reaction-diffusion difference equations and to a Volterra difference equation.
Estimates for the norms of solutions of delay difference systems
Rigoberto Medina
International Journal of Mathematics and Mathematical Sciences , 2002, DOI: 10.1155/s0161171202013017
Abstract: We derive explicit stability conditions for delay difference equations in ℂn (the set of n complex vectors) and estimates for the size of the solutions are derived. Applications to partial difference equations, which model diffusion and reaction processes, are given.
Estimates for the norms of solutions of difference systems with several delays
Rigoberto Medina
International Journal of Mathematics and Mathematical Sciences , 2004, DOI: 10.1155/s016117120430801x
Abstract: We derive explicit stability conditions for time-dependent difference equations with several delays in Cn (the set of n complex vectors) and estimates for the size of the solutions. The growth rates obtained here are not necessarily decay rates.
El arte de pensar sin paradigmas
Lanz,Rigoberto;
Enlace , 2007,
Abstract: this essay makes a very analytical and critical reflection about the paradigm crisis of modern rationality. namely, a crisis that undermines the "fundamentals" of what was once understood as scientific reason, epistemic subject, progress in history and education. the uniformity of thought organized in disciplines, in a normative of empirical and causal explanation, in a vision of reality from "meta-stories", has come to an end. postmodern thought attempts to offer an exit out of this crisis from another understanding and hermeneutic of complex, non-linear sense for our perception of reality. uncertainties create new random, weak and instant movements, that break the unifying rationality of modernity and give way to post-modernity?s deconstructive rationality, that proposes the a recreational task of generation of new knowledge.
Lo político transfigurado. Estrategias para entrar al mundo postmoderno
LANZ,Rigoberto;
Utopìa y Praxis Latinoamericana , 2006,
Abstract: abstract this is a reflection from the external vertex, which could be understood as the people category, in an ideological, political, social, cultural and historic sense. it is more than an intellectual, elite, class or left or right wing messianic vanguard-ism, it is each one of us who at some moment or in some manner call ourselves the people, and find ourselves confronted in the present or future with the destiny of social reality. in a very different manner from colonial times, we can interpret now, from the trans-disciplinary science of social sciences, or from the post-modern vision, the de-construction of peoples, and the liberation of repressive contents through liberating actions. we must become aware of the new dimension that protagonism is creating in what is latin american politics.
Dilemas de la construcción democrática. Una mirada desde Venezuela
Rigoberto Lanz
Foro Interno : Anuario de Teoría Política , 2002,
Abstract:
Stabilization of Discrete-Time Control Systems with Multiple State Delays
Rigoberto Medina
Advances in Difference Equations , 2009,
Abstract: We give sufficient conditions for the exponential stabilizability of a class of perturbed time-varying difference equations with multiple delays and slowly varying coefficients. Under appropiate growth conditions on the perturbations, combined with the "freezing" technique, we establish explicit conditions for global feedback exponential stabilizability.
Absolute Stability of Discrete-Time Systems with Delay
Rigoberto Medina
Advances in Difference Equations , 2008, DOI: 10.1155/2008/396504
Abstract: We investigate the stability of nonlinear nonautonomous discrete-time systems with delaying arguments, whose linear part has slowly varying coefficients, and the nonlinear part has linear majorants. Based on the ¢ € freezing ¢ € technique to discrete-time systems, we derive explicit conditions for the absolute stability of the zero solution of such systems.
Absolute Stability of Discrete-Time Systems with Delay
Medina Rigoberto
Advances in Difference Equations , 2008,
Abstract: We investigate the stability of nonlinear nonautonomous discrete-time systems with delaying arguments, whose linear part has slowly varying coefficients, and the nonlinear part has linear majorants. Based on the "freezing" technique to discrete-time systems, we derive explicit conditions for the absolute stability of the zero solution of such systems.
Rese a de "Ciencia con consciencia" de Edgar Morin
Rigoberto LANZ
Utopia y Praxis Latinoamericana , 2008,
Abstract:
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