The existence of current–time universe’s acceleration is usually modeled by means of two main strategies. The first makes use of a dark energy barotropic fluid entering by hand the energy–momentum tensor of Einstein’s theory. The second lies on extending the Hilbert–Einstein action giving rise to the class of extended theories of gravity. In this work, we propose a third approach, derived as an intrinsic geometrical effect of space–time, which provides repulsive regions under certain circumstances. We demonstrate that the effects of (...) repulsive gravity naturally emerge in the field of a homogeneous and isotropic universe. To this end, we use an invariant definition of repulsive gravity based upon the behavior of the curvature eigenvalues. Moreover, we show that repulsive gravity counterbalances the standard gravitational attraction influencing both late and early times of the universe evolution. This phenomenon leads to the present speed up and to the fast expansion due to the inflationary epoch. In so doing, we are able to unify both dark energy and inflation in a single scheme, showing that the universe changes its dynamics when \, at the repulsion onset time where this condition is satisfied. Further, we argue that the spatial scalar curvature can be taken as vanishing because it does not affect at all the emergence of repulsive gravity. We check the goodness of our approach through two cosmological fits involving the most recent union 2.1 supernova compilation. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Du Bois’s “Afterthought”A Pedagogical Variant for Continental PhilosophyHernando A. EstévezThe Souls of Black Folk is a pedagogical text that echoes continental philosophy’s aim of preparing humankind for the genuine practice of philosophical life through critique. In this text, Du Bois uses pedagogy to expose destructive and oppressive aspects of the Western tradition in its conflicting ideas and practices. In particular, I read Du Bois’s “afterthought” in Souls of Black (...) Folk as a form of critique that is expressly pedagogical, in that it prepares black individuals to play their destined role in this new era of history, and it calls for a continuous rethinking of the politics of higher education. While describing his early academic, political, and intellectual journey, Du Bois alludes to his initial and persistent concern with the impact of education on the formation of black men’s civil subjectivity. According to Du Bois, “My problem then was how, into the inevitable and logical democracy which was spreading over the world, could black folk in America and particularly in the South be openly and effectively admitted; and the colored people of the world allowed their self-government?” (Du Bois [1940] 1983, 29). For Du Bois such a question has sufficient political and social force to de-center the truths produced by the Western tradition as well as the precepts determining individuals’ subjectivity and self-government. Self-governance underlies Du Bois’s pedagogical and political projects as it is responsible for transforming black individuals’ self-perception and their relation to society. Du Bois approaches autonomy and self-governance pedagogically, by awakening individuals’ capacities for them by means of critique, through [End Page 82] questioning the historical basis on which the black race has been determined politically by the Western tradition.Du Bois’s essay Of the Training of Black Men (1902)1 begins by describing three “streams of thought,” which carry within the depth of their ideological flow ideas and ideals about humanity. Each stream has an epistemological and ontological force, which organizes the source of knowledge about the nature of black individuals’ being and existence. The force of the first stream of thought calls for an ethos that could unify humanity by multiplying its wants through worldwide cooperation. The second stream affirms the racism produced by theories explaining the origin of the black race, and the third calls for a civil struggle of black and whitened individuals whose political ideals challenge the presumed universal validity of the first two. Each stream of thought is followed by an afterthought, which questions the epistemological ground for moral and ontological claims of each of the three streams regarding the relationship between black individuals and the world. Du Bois deploys the pedagogical force of the afterthought most effectively in the political strength of the third stream of thought, in the emergence of suspicion. Through suspicion, a different possibility appears for thinking black individuals’ relationship with the world. This suspicion initiates a descriptive and normative analysis by challenging the pedagogical system on which beliefs and ideas about black individuals’ reality and future have been invented. In other words, suspicion dislodges history’s determinism by provoking self-reflection through critique of the Western philosophical tradition.In the words of Du Bois,And last of all there trickles down that third and darker thought—the thought of the things themselves, the confused, half-conscious mutter of men who are black and whitened, crying “Liberty, Freedom, Opportunity—vouchsafe to us, O boastful World, the chance of living men!” To be sure behind the thought lurks afterthought,—suppose, after all, the World is right and we are less than men? Suppose this mad impulse within is all wrong, some mock mirage from the untrue?(Du Bois [1903] 2006, 68; my emphasis)Furthermore, the “afterthought” and its immanent force of suspicion explore other subjective dimensions—the desires, struggles and dreams of the black race—which reveals alternative modes of being in the world.2 The political shift initiated by the afterthought’s critique is capable of opening up new historical categories and reconstructing the arena in which subjectivity occupies a new theoretical framework. The afterthought identifies and supersedes... (shrink)

Entre Scylla y Caribdis -- El lenguaje adicional en Jacques Prévert -- L'étranger, absurdo y rebelión en Camus -- La existencia en profundidad.

Transition experienced by trans people shakes Social Sciences conven-tional understanding of time and space as static analytical units based on tradi-tional biological and physical axioms. Overcoming sexual binarism entails also questioning time and space as isolated elements to become, instead, entangled realities. Departing from trans studies and Halberstam´s concepts of queer temporalities and space as theoretical framework, this papers lines up the indi-vidual story of a trans man with physical disability and ASD with social “trans-formations”, by linking the exposition of (...) the body with the transgression of heteronormative cis time, to be replaced, gradually by trans temporality and new ways of cohabitating spaces. (shrink)

"Un escritor ejemplar", texto de Hernando Téllez sobre Gómez Dávila, quizás una de las primeras aproximaciones hechas a una figura autoral que ya empezaba a despertar un profundo interés en la crítica literaria colombiana.

In this paper we describe the Priestley space of a quasi-Stone algebra and use it to show that the class of finite quasi-Stone algebras has the amalgamation property. We also describe the Priestley space of the free quasi-Stone algebra over a finite set.

In this paper we exhibit a non-finitely based, finitely generated quasi-variety of De Morgan algebras and determine the bottom of the lattices of sub-quasi-varieties of Kleene and De Morgan algebras.

In this paper we exhibit a non-finitely based, finitely generated quasi-variety of De Morgan algebras and determine the bottom of the lattices of sub-quasi-varieties of Kleene and De Morgan algebras.

In this paper we characterize the join irreducible elements of the free algebras on n free generators in the subvarieties of the variety V0 of pseudocomplemented De Morgan algebras satisfying the identity xx′* = ′*.

This paper studies two aspects of John Duns Scotus’s Prologue to his Questions on the Metaphysics of Aristotle. The a priori argument to prove the nobility and dignity of metaphysics and the treatment of the question about the scientific object of metaphysics and its articulation with the other realities treated in this science. The paper also shows how Scotus’s prologue follows an interpretative tradition whose principal interlocutors are Thomas Aquinas and Avicenna.

Finite demi-p-lattices are described in terms of the poset of its join irreducible elements endowed with a suitable set of maps. Description of the free algebras of demi-p-lattices and almost-p-lattices with n free generators are given.

In this note we give equational bases for varieties of quasi-Stone algebras.

In this article, we aim to carry out a comparative analysis of the short stories The Idiots, by Joseph Conrad, and La gallina degollada, by Horacio Quiroga, whereby we introduce the term conjunction; in this case, the conjunction of horror. To this end, we refer to the key actions that are common to the two stories. For reasons of transparency, we avoid the excess of theories regarding intertextual relations, although we allude to one key theoretical concept for this study: the (...) parody, proposed by Bakhtin. Our purpose, however, is to emphasize our own conceptual proposal: that of the conjunction. It is our intention that the readers face themselves with the antecedent story which gives birth to the succeeding story, and reflect on the creative process, on the poetics itself. As the axis of articulation of this article, we highlight the influence of Conrad on Quiroga, and how both writers, in the above-mentioned stories, conceive the theme of horror based on the motif of the brothers who suffer physical and mental degradation, which trigger tragedies for the young couples. (shrink)

Philosophizing the Americas establishes the field of inter-American philosophy. Bringing together contributors who work in Africana Philosophy, Afro-Caribbean philosophy, Latin American philosophy, Afro-Latin philosophy, decolonial theory, and African American philosophy, the volume examines the full range of traditions that have, separately and in conversation with each other, worked through how philosophy in both establishes itself in the Americas and engages with the world from which it emerges. The book traces a range of questions, from the history of philosophy in the (...) Americas to philosophical questions of race, feminism, racial eliminativism, creolization, epistemology, coloniality, aesthetics, and literature. The essays place an impressive range of philosophical traditions and figures into dialogue with one another: some familiar, such as José Martí, Sylvia Wynter, Martin R. Delany, José Vasconcelos, Alain Locke, as well as such less familiar thinkers as Arturo Alfonso Schomburg, Hilda Hilst, and George Lamming. In each chapter, the contributors find fascinating and productive matrices of tension or convergence in works throughout the Americas. The result is an original and important contribution to knowledge that introduces readers from various disciplines to unfamiliar yet compelling ideas and considers familiar texts from novel and prescient perspectives. Philosophizing the Americas stands alone as a representation of current scholarly debates in the field of inter-American philosophy. Contributors: Stephanie Rivera Berruz, Jacoby Adeshei Carter, Nadia Celis, Tommy J. Curry, Hernando A. Estévez, Daniel Fryer, James B. Haile III, Chike Jeffers, Lee A. McBride III, Michael Monahan, Adriana Novoa, Susana Nuccetelli, Andrea J. Pitts, Dwayne A. Tunstall, and Alejandro A. Vallega. (shrink)

RESUMEN La fenomenología de Husserl está inmersa en un entramado de regresiones y revisiones conceptuales que dificultan la identificación de una estructura sistémica. Los conceptos característicos de la fenomenología carecen de univocidad y no son propios de algunas obras de Husserl. Philosophie der Arithmetik ilustra el problema referido. ¿Puede inscribirse esta obra dentro de la categoría de texto fenomenológico? ¿Es posible hablar de una fenomenología de la matemática en Husserl? y ¿qué sentido tendría esto? Los objetivos del presente ensayo son: (...) primero, analizar la dificultad que tiene Philosophie der Arithmetik para responder a las inquietudes de la filosofía de las matemáticas, y segundo, proponer la posibilidad de una fenomenología de la matemática condicionada a la clarificación conceptual y al estudio crítico de la influencia de la tradición analítica sobre la filosofía de las matemáticas. ABSTRACT Husserl's phenomenology is immersed in a network of regressions and conceptual revisions that hinder the identification of a systemic structure. The characteristic concepts of phenomenology fall short of uniqueness and are not appropriate for some of Husserl's works. Philosophie der Arithmetik illustrates the aforementioned problem. Can this work be classified under the category of phenomenological texts? Is it possible to talk about a phenomenology of mathematic in Husserl? And what would be the point of this? The objectives of the present essay are: first, to analyze the difficulty that Philosophie der Arithmetik has responding to the concerns of the philosophy of mathematics, and second, to propose the possibility of a phenomenology of mathematics, conditioned to conceptual clarification and critical study of the influence of the analytical tradition on the philosophy of mathematics. (shrink)