In this review, we discuss the functional equivalence of the avian and mammalian hippocampus, based mostly on our own research in domestic chicks, which provide an important developmental model. In birds, like in mammals, the hippocampus plays a central role in processing spatial information. However, the structure of this homolog area shows remarkable differences between birds and mammals. To understand the evolutionary origin of the neural mechanisms for spatial navigation, it is important to test how far theories developed for the (...) mammalian hippocampus can also be applied to the avian hippocampal formation. To address this issue, we present a brief overview of studies carried out in domestic chicks, investigating the direct involvement of chicks’ hippocampus homolog in spatial navigation. (shrink)

To foster an adequate understanding of relational sociology, it is necessary to consider the theoretical grounds upon which it is based. The first aspect to highlight is the realist assumption of social relations as the causal force from which society originates. It is upon this decisive dimension that the difference between non-contingent and contingent aspects of the social is founded. Overlooking this difference issues in an inadequate understanding both of the autonomy of, and of the interaction between, actors and social (...) structures. Moving from these considerations, in the second part of this essay I will consider a third foundational aspect of social relations: social relations as ‘determination’ of reciprocity, and conclude my investigation by tackling the crucial theme of the social time of change and its connection to social relations. (shrink)

Departing from the considerations of Part 1, in the second and final Part of this essay I consider a third foundational aspect of the social relation: the social relation as ‘determination’ of reciprocity, and conclude my investigation by tackling the crucial theme of the social time of change and its connection to the social relation.

When we interpret modal ◊ as the limit point operator of a topological space, the Gödel-Löb modal system GL defines the class Scat of scattered spaces. We give a partition of Scat into α-slices S α , where α ranges over all ordinals. This provides topological completeness and definability results for extensions of GL. In particular, we axiomatize the modal logic of each ordinal α, thus obtaining a simple proof of the Abashidze–Blass theorem. On the other hand, when we interpret (...) ◊ as closure in a topological space, the Grzegorczyk modal system Grz defines the class HI of hereditarily irresolvable spaces. We also give a partition of HI into α-slices H α , where α ranges over all ordinals. For a subset A of a hereditarily irresolvable space X and an ordinal α, we introduce the α-representation of A, give an axiomatization of the α-representation of A, and characterize H α in terms of α-representations. We prove that ${X \in {\bf H}_{1}}$ iff X is submaximal. For a positive integer n, we generalize the notion of a submaximal space to that of an n-submaximal space, and prove that ${X \in {\bf H}_{n}}$ iff X is n-submaximal. This provides topological completeness and definability results for extensions of Grz. We show that the two partitions are related to each other as follows. For a successor ordinal α = β + n, with β a limit ordinal and n a positive integer, we have ${{\bf H}_{\alpha} \cap {\bf Scat} = {\bf S}_{\beta+2n-1} \cup {\bf S}_{\beta+2n}}$ , and for a limit ordinal α, we have ${{\bf H}_{\alpha} \cap {\bf Scat} = {\bf S}_{\alpha}}$ . As a result, we obtain full and faithful translations of ordinal complete extensions of Grz into ordinal complete extensions of GL, thus generalizing the Kuznetsov–Goldblatt–Boolos theorem. (shrink)

We interviewed Galileo Morandi, a young Italian architect working in a research project on architecture and new technologies and author of several publications about the relation between city, territory and project. The discussion starts and finishes in a place where Morandi studied and worked, Dubai – example of a city in rapid growth and in its way iconic representation of the new globalized cities – passing through Milan and Los Angeles, the new Chinese town and a village in (...) the mountains. The role played by city plans allows to discuss the contemporary city between an architectural perspective and a political awareness. The result is a first partial experiment to connect different urban perspectives. (shrink)

It is a classic result in modal logic, often referred to as Jónsson-Tarski duality, that the category of modal algebras is dually equivalent to the category of descriptive frames. The latter are Kripke frames equipped with a Stone topology such that the binary relation is continuous. This duality generalizes the celebrated Stone duality for boolean algebras. Our goal is to generalize descriptive frames so that the topology is an arbitrary compact Hausdorff topology. For this, instead of working with the boolean (...) algebra of clopen subsets of a Stone space, we work with the ring of continuous real-valued functions on a compact Hausdorff space. The main novelty is to define a modal operator on such a ring utilizing a continuous relation on a compact Hausdorff space.Our starting point is the well-known Gelfand duality between the category ${\sf KHaus}$ of compact Hausdorff spaces and the category $\boldsymbol {\mathit {uba}\ell }$ of uniformly complete bounded archimedean $\ell $ -algebras. We endow a bounded archimedean $\ell $ -algebra with a modal operator, which results in the category $\boldsymbol {\mathit {mba}\ell }$ of modal bounded archimedean $\ell $ -algebras. Our main result establishes a dual adjunction between $\boldsymbol {\mathit {mba}\ell }$ and the category ${\sf KHF}$ of what we call compact Hausdorff frames; that is, Kripke frames equipped with a compact Hausdorff topology such that the binary relation is continuous. This dual adjunction restricts to a dual equivalence between ${\sf KHF}$ and the reflective subcategory $\boldsymbol {\mathit {muba}\ell }$ of $\boldsymbol {\mathit {mba}\ell }$ consisting of uniformly complete objects of $\boldsymbol {\mathit {mba}\ell }$. This generalizes both Gelfand duality and Jónsson-Tarski duality. (shrink)

This short essay is an introduction to Emmanuele Morandi streams of research, which aimed at recreating a new connection between social sciences and metaphysics, empirical research and moral reflections. After a brief introduction, the kind of anthropological critical metaphysical realism fostered by Morandi is outlined. The third paragraph addresses some foundational aspect of his social ontology; lastly, the complex distinction between social, political and economic spheres will be presented.

Este ensayo es producto de una investigación en el campo de la teoría e historia del arte y se concentra en el análisis de la pintura inédita Escena de dormitorio (c.1985-86) del destacado escritor y pintor chileno Adolfo Couve Rioseco (1940-1998). La obra salió a la luz en 2021, y su estudio no solo permite abordar problemas relativos a autoría, data, técnica y gestos pictóricos, sino también comentar los espacios domésticos y las relaciones familiares del autor. Sobre todo, permite profundizar (...) en sus filiaciones visuales; en este caso puntual, su interés por óleos tales como Jeremías lamentando la destrucción de Jerusalén (1630) de Rembrandt van Rijn; una de las cuatro versiones de El muchacho del chaleco rojo (c.1889-90) de Paul Cézanne, y las naturalezas muertas del italiano Giorgio Morandi, a partir de los cuales probablemente Couve construyó el cuadro hasta ahora no documentado que aquí se somete a escrutinio. (shrink)

This chapter contains sections titled: Introduction Section 1: Rational Judgment and Understanding Section 2: The Structure of Systematicity Section 3: Systematicity as Methodological Maxim? Section 4: Nature and Rational Structure.

Duchamp’s aspiration to become more philosophical in his art mirrors Heidegger’s aspiration to become more poetical in his philosophy. Their shared mistrust of subjectivity led them to question the continued viability of art on the one hand and of philosophy on the other. This article examines Heidegger’s essay in juxtaposition to Duchamp’s work, highlighting Heidegger’s (often underappreciated) playful approach to his weighty task, and, in regard to Duchamp, revealing just how serious art can be when it doesn’t appear to take (...) itself too seriously. (shrink)

Questa è la breve storia , forse un poco romanzata, del gatto che, se non forse il più citato, è di sicuro il più bistrattato della storia della fisica e della filosofia: il gatto di Schrödinger.