ABSTRACT Topos quantum theory is standardly portrayed as a kind of ‘neo-realist’ reformulation of quantum mechanics.1 1 In this article, I study the extent to which TQT can really be characterized as a realist formulation of the theory, and examine the question of whether the kind of realism that is provided by TQT satisfies the philosophical motivations that are usually associated with the search for a realist reformulation of quantum theory. Specifically, I show that the notion of the quantum (...) state is problematic for those who view TQT as a realist reformulation of quantum theory. 1Introduction 2Topos Quantum Theory 2.1Phase space 2.2Hilbert space 2.3Beyond Hilbert space 2.4Defining realism 2.5The spectral presheaf 2.6The logic of topos quantum theory 3Interpreting States in Topos Quantum Theory 4Interpreting Truth Values and Clopen Subobjects in Topos Quantum Theory 4.1Interpreting the truth values 4.2Interpreting Subcl 5Neo-realism 5.1The covariant approach 6Conclusion. (shrink)

The Topos of Music is the upgraded and vastly deepened English extension of the seminal German Geometrie der Töne. It reflects the dramatic progress of mathematical music theory and its operationalization by information technology since the publication of Geometrie der Töne in 1990. The conceptual basis has been vastly generalized to topos-theoretic foundations, including a corresponding thoroughly geometric musical logic. The theoretical models and results now include topologies for rhythm, melody, and harmony, as well as a classification theory (...) of musical objects that comprises the topos-theoretic concept framework. Classification also implies techniques of algebraic moduli theory. The classical models of modulation and counterpoint have been extended to exotic scales and counterpoint interval dichotomies. The probably most exciting new field of research deals with musical performance and its implementation on advanced object-oriented software environments. This subject not only uses extensively the existing mathematical music theory, it also opens the language to differential equations and tools of differential geometry, such as Lie derivatives. Mathematical performance theory is the key to inverse performance theory, an advanced new research field which deals with the calculation of varieties of parameters which give rise to a determined performance. This field uses techniques of algebraic geometry and statistics, approaches which have already produced significant results in the understanding of highest-ranked human performances. The book's formal language and models are currently being used by leading researchers in Europe and Northern America and have become a foundation of music software design. This is also testified by the book's nineteen collaborators and the included CD-ROM containing software and music examples. (shrink)

Topos księgi należy do najsilniej zakorzenionych motywów w kulturze. Tradycyjnie wiążący się z księgami świętymi, średniowieczną Księgą Natury oraz nowożytną encyklopedią, występujący w filozofii, literaturze, mitach, legendach, religiach i kulturze masowej, oznaczał źródłową prawdę, pełnię sensu, zamknięcie i wyczerpanie, jednym słowem – wiedzę absolutną. Jego nowoczesna wersja jawi się zaś jako księga-kłącze, czyli niesterowny, acentryczny, niehierarchiczny system otwarty, którego współczesną wersję stanowi Internet.

The present work depicts the content and functions of very specific carriers of collective memory, namely the epigraphic transmissions. The rich tradition of using epigraphic objects, their durability and communicative seriousness, make them consistently attractive forms of transferring memory also in small local communities of towns, villages, parishes, schools and working commu-nities. Those seen as particularly interesting ones are epigraphic objects, whose task is to “commemorate the origins”. The use of the “topos of origins” creates an initiation moment on (...) the line of collective memory of a given local community. The observations presented in the work relate to the epigraphic resource, created in the last half century within the spatial framework of the borderland of Silesia and Lesser Poland. (shrink)

Os Grafos Existenciais de Peirce oferecem uma compreensão geométrica de uma variedade de lógicas (clássica, intuicionista, modal, de primeira ordem). A sua interpretação geométrica é dada por transformações topológicas de curvas fechadas (Jordan) no plano, mas pode ser estendida a outras superfícies (esfera, cilindro, toro etc.). Além disso, é possível desenhar grafos existenciais sobre superfícies de Riemann gerais e, introduzindo ferramentas da geometria algébrica (Feixes, Toposes de Grothendieck, Toposes Elementares), é possível tentar capturar as lógicas nas formas geométricas por meio (...) de um novo Topos de Grafos Existenciais sobre Superfícies de Riemann e por meio do subobjeto classificador do topos. Oferecemos novas perspectivas (conceitos, definições, exemplos, conjecturas) ao longo desse caminho. (shrink)

We define the notion of a model of higher-order modal logic in an arbitrary elementary topos E. In contrast to the well-known interpretation of higher-order logic, the type of propositions is not interpreted by the subobject classifier ΩE, but rather by a suitable complete Heyting algebra H. The canonical map relating H and ΩE both serves to interpret equality and provides a modal operator on H in the form of a comonad. Examples of such structures arise from surjective geometric (...) morphisms f : F → E, where H = f∗ΩF. The logic differs from non-modal higher-order logic in that the principles of functional and propositional extensionality are not longer valid but may be replaced by modalized versions. The usual Kripke, neighborhood, and sheaf semantics for propositional and first-order modal logic are subsumed by this notion. (shrink)

We extend the topos-theoretic treatment given in previous papers of assigning values to quantities in quantum theory. In those papers, the main idea was to assign a sieve as a partial and contextual truth-value to a proposition that the value of a quantity lies in a certain set D of real numbers. Here we relate such sieve-valued valuations to valuations that assign to quantities subsets, rather than single elements, of their spectrum (we call these interval valuations). There are two (...) main results. First, there is a natural correspondence between these two kinds of valuation, which uses the notion of a state's support for a quantity (Section 3). Second, if one starts with a more general notion of interval valuation, one sees that our interval valuations based on the notion of support (and correspondingly, our sieve-valued valuations) are a simple way to secure certain natural properties of valuations, such as monotonicity (Section 4). (shrink)

The concept of topos has received considerable attention from both argumentation and discourse studies, although its usage and meaning remain obscure. In this article, I argue that the rediscovery of Aristotelian thought might provide a comprehensible explication of topos. Despite the discourse historical approach’s emphasis on topos, its context is found to be limited and this exposes the argumentation strategies of the DHA to criticism. To overcome any shortcomings and provide a better understanding of topos, a (...) classical approach to the concept is suggested, derived from Aristotle’s rhetoric and dialectic. By focusing on Greek media discourses on ‘Islamist terrorism’, I seek to illustrate the synthesis between the DHA’s argumentation strategies and Aristotelian topos as a fruitful analytical and theoretical tool. (shrink)

Any attempt to construct a realist interpretation of quantum theory founders on the Kochen-Specker theorem, which asserts the impossibility of assigning values to quantum quantities in a way that preserves functional relations between them. We construct a new type of valuation which is defined on all operators, and which respects an appropriate version of the functional composition principle. The truth-values assigned to propositions are (i) contextual; and (ii) multi-valued, where the space of contexts and the multi-valued logic for each context (...) come naturally from the topos theory of presheaves. The first step in our theory is to demonstrate that the Kochen-Specker theorem is equivalent to the statement that a certain presheaf defined on the category of self-adjoint operators has no global elements. We then show how the use of ideas drawn from the theory of presheaves leads to the definition of a generalised valuation in quantum theory whose values are sieves of operators. In particular, we show how each quantum state leads to such a generalised valuation. A key ingredient throughout is the idea that, in a situation where no normal truth-value can be given to a proposition asserting that the value of a physical quantity A lies in a set D of real numbers , it is nevertheless possible to ascribe a partial truth-value which is determined by the set of all coarse-grained propositions that assert that some function f(A) lies in f(D), and that are true in a normal sense. The set of all such coarse-grainings forms a sieve on the category of self-adjoint operators, and is hence fundamentally related to the theory of presheave. (shrink)

Au début du Sophiste, Socrate demande au visiteur éléate ce qu’ont pensé des genres philosophe, sophiste et politique, « ceux » qui sont de ce lieu-là ». L’article a pour but d’éclairer cette dernière expression et en particulier son mot clef « topos ». Il est montré que les significations de ce terme, dans son contexte, sont multiples et que cette diversité, loin d’apporter la confusion, permet au contraire et précisément d’ouvrir les diverses perspectives du dialogue. At the beginning (...) of the Sophist, Socrates asks the Eleatic Visitor how the three kinds Philosopher, Sophist and Statesman, have been understood by “those who are in this place”. The purpose of this paper is to enlighten this periphrasis and specially its key-word “topos”. We have showed that, in its context, this word has four main meanings, and that this diversity, far from causing confusion, opens up the dialogue to various perspectives. (shrink)

Terminologically, the “topos of mu” and the “predicative self” originated in the Kyoto School and are traceable to the work of its founder NISHIDA Kitarō. The full phrase was coined by NAKAMURA Yūjirō. Conceptually, the topos of mu or place of nothingness is Nishida’s development of the Buddhist notion of anatta or no self and radiating out from that locus of emptiness is a self constituted by its predicates or the things to which it is connected by an (...) existential copula. Deeply ingrained in Western languages, metaphysics, and religion is the subjective self, in both the linguistic and psychological senses of “subjective.” That Buddhism, as reworked by the Kyota School, or Daoism, or any other non-Western tradition of thought, will catch on in the West was a puerile fantasy of some members of the first generation of environmental philosophers. There is a good chance, however, that the Western worldview may evolve toward a similar conception of the self—as ecological, relational, or systems thinking becomes ever more ingrained. We in the West may come to understand that we are constituted by our social and environmental relationships, in which we are deeply embedded and on which we are utterly dependent, such that world care is the essence of self-help. (shrink)

In a previous paper, we have proposed assigning as the value of a physical quantity in quantum theory, a certain kind of set (a sieve) of quantities that are functions of the given quantity. The motivation was in part physical---such a valuation illuminates the Kochen-Specker theorem; and in part mathematical---the valuation arises naturally in the topos theory of presheaves. This paper discusses the conceptual aspects of this proposal. We also undertake two other tasks. First, we explain how the proposed (...) valuations could arise much more generally than just in quantum physics; in particular, they arise as naturally in classical physics. Second, we give another motivation for such valuations (that applies equally to classical and quantum physics). This arises from applying to propositions about the values of physical quantities some general axioms governing partial truth for any kind of proposition. (shrink)

We extend the topos-theoretic treatment given in previous papers of assigning values to quantities in quantum theory, and of related issues such as the Kochen-Specker theorem. This extension has two main parts: the use of von Neumann algebras as a base category (Section 2); and the relation of our generalized valuations to (i) the assignment to quantities of intervals of real numbers, and (ii) the idea of a subobject of the coarse-graining presheaf (Section 3).

In philosophy, it is always refreshing to introduce unconventional ideas. It requires a certain audacity from the author; he or she may face the wall of silence or be shunned by academia, both treatments being undesirable. However, these are more rewarding than gathering laurels for beating the dead philosophical cats like Humes, Leibnitzs, Wittgensteins, Whiteheads, and others, a practice that for many philosophers is their life's opus. Bartłomiej Skowron’s book _Part and Whole: Towards Topo-Ontology_, published by Oficyna Wydawnicza Politechniki Warszawskiej (...) in 2021, certainly does not fall into this category. Skowron undertakes a discovery trip into an unknown land in his book, exploring new philosophical territories. (shrink)

This paper develops some ideas from previous work (coauthored, mostly with C.J.Isham). In that work, the main proposal is to assign as the value of a physical quantity in quantum theory (or classical physics), not a real number, but a certain kind of set (a sieve) of quantities that are functions of the given quantity. The motivation was in part physical---such a valuation illuminates the Kochen-Specker theorem; in part mathematical---the valuations arise naturally in the theory of presheaves; and in part (...) conceptual---the valuations arise from applying to propositions about the values of physical quantities some general axioms governing partial truth for any kind of proposition. In this paper, I give another conceptual motivation for the proposal. I develop (in Sections 2 and 3) the notion of a topos (of which presheaves give just one kind of example); and explain how this notion gives a satisfactory general framework for making sense of the idea of partial truth. Then I review (in Section 4) how our proposal applies this framework to the case of physical theories. (shrink)

Zusammenfassung Der Begriff,interkultureller Konflikt' wird nicht nur in Medien und Öffentlichkeit, sondern auch in der wissenschaftlichen Diskussion zur Bezeichnung von Auseinandersetzungen verwendet, an denen Menschen mit Migrationshintergrund beteiligt sind. Den Konfliktbeteiligten werden dabei Mentalitätsunterschiede attestiert, die häufig mit Verweis auf kulturelle Differenzen erklärt werden. Der Beitrag liefert Erklärungen dafür, warum solche Auseinandersetzungen im Sport so selbstverständlich als,interkulturelle' Konflikte gekennzeichnet werden. Im Mittelpunkt der konflikt­theoretischen Analyse steht die Frage, wie das,Interkulturelle' zum Topos von Konflikten im Sport wird. Ziel ist es, (...) gängige Annahmen des Diskurses über interkulturelle Konflikte im Sport kritisch zu hinterfragen. Den theoretischen Rahmen hierfür bildet die systemtheoretische Konfliktsoziologie. (shrink)

The aim of the paper is to show that topoi are useful in the categorial analysis of the constructive logic with strong negation. In any topos ϵ we can distinguish an object Λ and its truth-arrows such that sets ϵ have a Nelson algebra structure. The object Λ is defined by the categorial counterpart of the algebraic FIDEL-VAKARELOV construction. Then it is possible to define the universal quantifier morphism which permits us to make the first order predicate calculus. The (...) completeness theorem is proved using the Kripke-type semantic defined by THOMASON. (shrink)

Christian apocalyptic sentiments of the late seventh century produced the Apocalypse of Pseudo-Methodius, a Syriac composition which proposes the immediate downfall of the Arab dominion at the hands of a last Roman emperor. This notion of the Last Roman Emperor who – after having defeated the Arabs – would usher in a time of prosperity, face the eschatological people of the North, and ultimately abdicate to God at the end of times developed into an apocalyptic motif of ubiquitous influence. Out (...) of its long-standing and wide-ranging tradition the present article deals with the afterlife of the Pseudo-Methodian Last Roman Emperor motif in the earlier Byzantine apocalyptic tradition. By means of conceptual comparison I map the use and the adaptations of this literary topos, thereby learning how this motif was accommodated to the Byzantine audience and how it became one of the most prominent motifs of Byzantine apocalyptic thought. My source material comprises the original Syriac Apocalypse, two Syriac apocalypses that are closely related to it, its first Greek redaction, five apocalypses from the Visions of Daniel group, and the Andreas Salos Apocalypse. Among others, I conclude that these apocalyptic texts show a tendency to fragment the Last Roman Emperor motif and delay the ultimate end of the world by prolonging the eschatological decline of the Roman Empire. (shrink)

This paper focuses on the significance of the concept of noise for cognition and computation. The concept of noise was massively transformed in the twentieth century with the advent of information theory, cybernetics, and computer science, all of which provide formal accounts of information and noise centrally concerned with contingency. We show how the concept has changed from these classical formulations, through developments in mathematics (topology and topos theory), computing (interactive computing and univalent foundations), and cognitive science (predictive processing (...) and cognitive morphodynamics). Ultimately it argues for the central importance of noise not only within a topological conception of cognition and computation, but also in the transcendental-empirical torsion of image schemata and the social interactive elaboration of freedom. (shrink)

We investigate a certain system of intuitionistic set theory from three points of view: an elementary set theory with bounded separation, a topos with distinguished inclusions, and a category of classes with a system of small maps. The three presentations are shown to be equivalent in a strong sense.

The daseinisation is a mapping from an orthomodular lattice in ordinary quantum theory into a Heyting algebra in topos quantum theory. While distributivity does not always hold in orthomodular lattices, it does in Heyting algebras. We investigate the conditions under which negations and meets are preserved by daseinisation, and the condition that any element in the Heyting algebra transformed through daseinisation corresponds to an element in the original orthomodular lattice. We show that these conditions are equivalent, and that, not (...) only in the case of non-distributive orthomodular lattices but also in the case of Boolean algebras containing more than four elements, the Heyting algebra transformed from the orthomodular lattice through daseinisation will contain an element that does not correspond to any element of the original orthomodular lattice. (shrink)

Les innombrables interprétations de l’allégorie de la caverne, aussi réduc­trices ou spéculatives, aussi fidèles à la lettre ou à l'esprit du texte soient-elles, paraissent s'effacer les unes les autres, comme balayées par la souplesse d'un texte qui autorise les lectures les plus élémentaires comme les plus raffinées. Cet "étrange tableau" qu'expose Socrate s'insère immé­dia­tement entre deux pôles d'intelligibilité censés en assurer la compréhension : l'image de la ligne au...

The concept of love has emerged as a central topic for philosophical and theoretical discussion over the past few years. Whereas the dominant ideology of love in contemporary culture insists that love be understood as a discovery of my long lost second half with whom I merge and finally recreate a whole, contemporary philosophers and theorists have stressed the need to reconsider the concept of love within an ethical framework that can sustain the idea of the other as forever different (...) and separate. Taking as a starting point two different taxi scenes offered by Foucault and Woolf respectively, the article outlines and discusses those two contemporary love grammars, focusing on the concepts of lack and fantasy. Whereas Woolf’s taxi scene is reminiscent of a notion of love as a fantasy of unification, Foucault’s notion of love not only observes the need to maintain the other’s specificity and separateness, but also considers lack and fantasy to be primary and fundamental parts of love as lived experience. While Foucault insists on pleasure and action he also observes the central and unavoidable power of imagination that is attributed the name and function of recollection. The article finally addresses the question of if and how we might be responsible for our daydreams and fantasies. (shrink)

For more than twenty years, Swiss photographer Tobias Madörin has been working on his photo series Topos. Creating staged tableaux in the manner of nineteenth-century painters, Madörin investigates the interaction between the inhabitants and their surrounding environments in countries as diverse as Spain, Uganda, Indonesia, and Japan. His large-scale images examine communal spaces, the outskirts of metropolises, waste disposals sites, and landscapes marked by agriculture and mining. Madörin's work reveals that these locations are the products of human visions and (...) ideals, yet they are also places of environmental exploitation. This tension, as well as Madörin's intelligent and empathetic approach to his subjects, makes his photographs evocative and complex. This book includes lavish, full-page photographs, many of which have never been published, and an introductory essay by Nadine Olonetzky that explains and contextualizes the photographer's oeuvre. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Journal of the History of Ideas 61.2 (2000) 343-346 [Access article in PDF] The Paradox Topos Lisa Gorton As William Egginton points out, 1 when Dante and Beatrice step outside the cosmos, they step into another set of concentric spheres. 2 These surround our (supposedly) geocentric cosmos, and yet they center upon God. The image affronts our logic of space. If these concentric spheres encompass us, how can (...) they center upon something somewhere else? The notion seems to turn space inside-out. But Dante's spatial paradox is not in truth a paradox of space. Instead, it is a spiritual paradox, set in terms of space. When Dante and Beatrice step outside the cosmos, they step outside space into an old philosophical topos, a spatial image of God. For that reason, Dante's image is not really akin to the spatial paradoxes of modern astrophysics, although Egginton's comparison of the two does provoke some fascinating comments upon medieval concepts of space. Egginton assesses Dante's paradox in light of medieval debates about space, place, and God. However, he overlooks the most important source for Dante's paradox--the symbolic geometry of Neoplatonic philosophy. 3Neoplatonic philosophers use spatial forms to imagine spiritual relationships. They develop a symbolic geometry, a spatial language of thought, which borrows nothing from physical space but its shapes: the center, the circle, and concentric spheres. Neoplatonists use this symbolic geometry because it offers a spatial way to imagine the relationship between a cause and its effect, without importing time differences into that relationship. In this way they seek to avoid the problems of time and causality, which the creation-myth in Timaeus introduced into Plato's philosophy: how and when could a timeless being make time? 4 [End Page 343]Plotinus, the first Neoplatonist, uses symbolic geometry to design an "Intellectual Cosmos," which he treats as quite distinct from our physical cosmos. 5 He imagines the source of life as a center: The Highest cannot be divided and allotted... thus a centre is an independent unity; everything within the circle has its own term in the centre, and to the centre the radii each bring their own. (Enneads, V. 1. 11). The "Highest" exists as the center of this "Intellectual Cosmos." Plotinus treats a center's geometric qualities as metaphysical attributes. Like an undimensioned central point, the "Highest" does not exist in space or time, and yet space and time radiate from it as a circumference radiates from its center.The bare symbolic space of Plotinus's "Intellectual Cosmos" has emotional connotations. Plotinus holds that "the center of a circle is distinctively a point of rest" (Enneads II. 2. 1). Lesser beings must turn sequentially through all the angles their center holds altogether at once: There is, we may put it, something that is centre; about it, a circle of light shed from it; round centre and first circle alike, another circle, light from light; outside that again, not another circle of light but one which, lacking light of its own, must borrow. (Enneads, IV. 3. 17) In Plotinus's "Intellectual Cosmos" life emanates from the center in concentric spheres. 6Dante and Beatrice step into such an "Intellectual Cosmos" when they step outside the physical world. They step into a spatial image that stands outside time and space, at the spiritual center of the poem, when they step into spheres that center upon a light too bright to look upon. Dante wonders where that center could be, and Beatrice responds to his silent question: "The nature of the universe, which holds the center still and moves all else around it, begins here as if from its turning point" (XXVII, 106-9). Egginton comments, "Dante's description of this absolute center as the origin of all movement and force in the universe" is "an 'eerie' likeness of what he [the modern astrophysicist, Robert Osserman] terms the retro-verse." More relevantly, it also refers to the "Intellectual Cosmos" of Neoplatonic philosophy, where the "Highest" is a center of rest, the starting point of light, movement, and life. [End Page 344]Plotinus... (shrink)

In der Mitte des zwanzigsten Jahrhunderts hielt der Informationsbegriff insbesondere durch die Molekularisierung der Genetik und die entstehende Kybernetik Einzug in die Biologie und avancierte zu einem der zentralen Begriffe der Lebenswissenschaften. Dass es sich dabei jedoch nicht um einen theoretischen Term handelt, sondern um einen schillernden Begriff, der innerhalb unterschiedlicher lebenswissenschaftlicher Paradigmen ganz verschiedenes bedeutet, lässt sich besonders deutlich am Beispiel der Biosemiotik und der Synthetischen Biologie aufzeigen. In beiden Paradigmen sind mit dem Informationsbegriff und dessen semantischem Feld auch (...) diverse Erklärungsansprüche verbunden, die im vorliegenden Band einer wissenschaftsphilosophischen Kritik unterzogen werden. (shrink)

In order to clarify Nishida’s notion of topos, I trace its forma­tion, starting with the notion of “pure experience,” of which he says: “To experience is to know the thing as it is.” By taking the act of “to know” as the thread that connects the ideas of pure experience and topos, I examine his early writings leading up to 1929, going beyond 1926, when Nishida’s essay “Basho” was published. Over against the commonly held “objectified” view of the (...) topos as a “location” or “field” in which the individual exists, a radically ontological reading of this notion emerges, requiring us to shift the vantage point from which we approach it. I conclude that Nishida introduced into his philosophi­cal system a locative dimension as an ontological feature, and we, con­scious beings, exist in this world “topologically”. The topos refers to the very logico-ontological mode of our being.In order to clarify what knowledge is, we need to begin with [the investigation of] reflective consciousness, rather than starting out with intellectual judgment. Consciousness pertaining to judgment cannot include the one [who judges] within it. It is an incomplete awareness that looks at the self externally. The explanation of how we know begins with the critical reflection of self-consciousness itself. Therein, we obtain the standpoint of genuine epistemology.Our real knowledge starts out with “I exist.” That “I exist” means that the topos is directly in the topos, and this is the standpoint of both inner perception and actual experience. (shrink)

I. Egner, “The role of topos in the use of a Wobe particle”.In the paper I am trying to show how a speaker using the particle {ie271-1} in his utterance calls upon a contextual assumption that can be formulated as a topos.After formulating a working hypothesis according to which the particle {ie271-2} signals to the hearer that the speaker's utterance is justified, I use English and Wobe paraphrases of the examples quoted in order to make explicit that justification.Wobe (...) paraphrases given by the informant suggest that in using {ie271-3} the speaker calls upon t contextual assumption that he feels is relevant in the speech situation. To the extent that this assumption is based on common sense knowledge, it seemed appropriate to use Ducrot's notion of topos to formulate it, e.g. (T) [The deeper one gets into the bush, the fewer white people he meets].One of the examples quoted calls attention to the fact that the topos called upon by way of {ie271-4} may or may not be validated, i.e. confirmed in the speech situation.Finally, the validation or non-validation of a topos seems to determine the illocutionary value of a wh-question containing {ie271-5} as request for information or request for explanation respectively. (192 words). (shrink)

Topos quantum theory represents a whole new approach to the formalization of non-relativistic quantum theory. It is well known that TQT replaces the orthomodular quantum logic of the traditional Hilbert space formalism with a new intuitionistic logic that arises naturally from the topos theoretic structure of the theory. However, it is less well known that TQT also has a dual logical structure that is paraconsistent. In this paper, we investigate the relationship between these two logical structures and study (...) the implications of this relationship for the definition of modal operators in TQT. (shrink)

Volume 40, Issue 4, November 2019, Page 389-402.

ABSTRACT Effective communication relies on the use of rhetorical devices and strategies to make ideas present in the minds of an audience. By employing the concept of cognitive environments, we can use the visual analogy of making an idea “present” to its fullest effect, empowering our rhetorical skills and helping influence audience reception. In this article, the author argues that while cognitive environments do indeed provide a significant and important conceptual tool for understanding and anticipating an audience’s experiences, beliefs, and (...) knowledge, a more robust sense of agreement is necessary. The article proposes the concept of a topos that serves as a shared meeting place within cognitive environments within which both author and audience contribute their background assumptions to find common ground and commonalities in interpretations. It is in figuring the topos effectively that cognitive environments can be more accurately and effectively mapped onto each other, and breaches between such environments can be productively bridged. (shrink)

We construct a sheaf-theoretic representation of quantum observables algebras over a base category equipped with a Grothendieck topology, consisting of epimorphic families of commutative observables algebras, playing the role of local arithmetics in measurement situations. This construction makes possible the adaptation of the methodology of Abstract Differential Geometry (ADG), à la Mallios, in a topos-theoretic environment, and hence, the extension of the “mechanism of differentials” in the quantum regime. The process of gluing information, within diagrams of commutative algebraic localizations, (...) generates dynamics, involving the transition from the classical to the quantum regime, formulated cohomologically in terms of a functorial quantum connection, and subsequently, detected via the associated curvature of that connection. (shrink)

Cet article interroge le statut du magique chez le premier Sartre à la fois comme héritage d'un dialogue avec la psychologie et l'anthropologie françaises et comme le lieu de la coupure phénoménologique par laquelle se développe une philosophie de l'existence originale. L'A. retrace l'apparition de la conscience magique, pour laquelle la spontanéité persiste d'une manière spécifique là où elle semblait mise en défaut, notamment dans les pathologies de l'imagination et dans l'émotion. Aussi la catégorie du magique permet-elle de penser l'autonomie (...) de la conscience irréfléchie en dotant ses différentes attitudes d'une signification selon une approche synthétique de la réalité-humaine. En un autre point névralgique chez Sartre, la conscience absolue s'emprisonne dans le monde selon un phénomène de dégradation grâce auquel apparaît le psychique : cette existence mixte entre pour-soi et en-soi est irréductiblement magique. Or, le fait psychique est le lieu des relations concrètes avec autrui et l'A. montre, qu'en dernière instance, le magique reparaît dans l'ontologie phénoménologique à travers le schème de la possession – possession d'autrui et possession des choses – mettant la transcendance au compte d'une sorcellerie originelle. (shrink)