Reflexiones sobre el valor actual del gobierno de Baratiaria y la quijotización de Sancho

[ES]En este artículo exploramos el quijotismo que aflora en Sancho Panza al aceptar el trabajo como escudero bajo la promesa del gobierno de la ínsula Barataria. Esta “tierra prometida” se convierte en el objeto de deseo de este rústico campesino que desea adoptar una nueva identidad de la misma manera que su amo deviene un caballero andante bajo la influencia libresca de las caballerías. Se analiza también el valor actual del gobierno de Sancho Panza, con sus aciertos y desaciertos, sus logros y sus dificultades.[EN]In this article we explore the outcropping quixotic Sancho Panza in accepting the job as squire under the government's promise of the island of Barataria. This "promised land" becomes the object of desire of this rustic peasant who wishes to adopt a new identity in the same way that his master becomes a bookish knight under the influence of epic tale. The present value of the government of Sancho Panza, with its successes and failures, achievements and difficulties are also analyzed.

On existence and uniqueness of positive solutions to a class of fractional boundary value problems

[EN] The purpose of this paper is to investigate the existence and uniqueness of positive solutions for the following fractional boundary value problem D 0 + α u ( t ) + f ( t , u ( t ) ) = 0 , 0 < t < 1 , u ( 0 ) = u ( 1 ) = u ′ ( 0 ) = 0 , where 2 < α ≤ 3 and D 0 + α is the Riemann-Liouville fractional derivative. Our analysis relies on a fixed-point theorem in partially ordered metric spaces. The autonomous case of this problem was studied in the paper [Zhao et al., Abs. Appl. Anal., to appear], but in Zhao et al. (to appear), the question of uniqueness of the solution is not treated. We also present some examples where we compare our results with the ones obtained in Zhao et al. (to appear). 2010 Mathematics Subject Classification: 34B15