Results for 'stability set of order d '

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  1. On the emptiness of the stability set of order d.Mathieu Martin - 2002 - Theory and Decision 52 (4):313-326.
    We know from Li's theorem (1993) that the stability set of order d may be empty for some preference profiles. However, one may wonder whether such situations are just rare oddities or not. In this paper, we partially answer this question by considering the restrictive case where the number of alternatives is the smallest compatible with an empty stability set. More precisely, we provide an upper bound on the probability for having an empty stability set of (...)
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  2.  22
    Scale of levels of care versus DNR orders.D. Vanpee - 2004 - Journal of Medical Ethics 30 (4):351-352.
    In his paper, which we read with interest, Cherniack argues that there is a worldwide increase in the use of do not resuscitate orders in the care of the elderly.1 As geriatricians in an emergency department and a geriatric department we are concerned by this important ethical topic, and we understand that this increase is a reflection of the demographic increase in frail very old persons. The elderly must be offered the best care, and age as such should not be (...)
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  3.  30
    Characterisation of organisational issues in paediatric clinical ethics consultation: a qualitative study.D. J. Opel, B. S. Wilfond, D. Brownstein, D. S. Diekema & R. A. Pearlman - 2009 - Journal of Medical Ethics 35 (8):477-482.
    Background: The traditional approach to resolving ethics concerns may not address underlying organisational issues involved in the evolution of these concerns. This represents a missed opportunity to improve quality of care “upstream”. The purpose of this study was to understand better which organisational issues may contribute to ethics concerns. Methods: Directed content analysis was used to review ethics consultation notes from an academic children’s hospital from 1996 to 2006 (N = 71). The analysis utilised 18 categories of organisational issues derived (...)
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  4.  64
    Are withholding and withdrawing therapy always morally equivalent?D. P. Sulmasy & J. Sugarman - 1994 - Journal of Medical Ethics 20 (4):218-224.
    Many medical ethicists accept the thesis that there is no moral difference between withholding and withdrawing life-sustaining therapy. In this paper, we offer an interesting counterexample which shows that this thesis is not always true. Withholding is distinguished from withdrawing by the simple fact that therapy must have already been initiated in order to speak coherently about withdrawal. Provided that there is a genuine need and that therapy is biomedically effective, the historical fact that therapy has been initiated entails (...)
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  5. Effect algebras and unsharp quantum logics.D. J. Foulis & M. K. Bennett - 1994 - Foundations of Physics 24 (10):1331-1352.
    The effects in a quantum-mechanical system form a partial algebra and a partially ordered set which is the prototypical example of the effect algebras discussed in this paper. The relationships among effect algebras and such structures as orthoalgebras and orthomodular posets are investigated, as are morphisms and group- valued measures (or charges) on effect algebras. It is proved that there is a universal group for every effect algebra, as well as a universal vector space over an arbitrary field.
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  6.  24
    Effect of long-period stacking ordered phase on thermal stability of refined grains in Mg-RE-based alloys.Y. X. Li, D. Qiu, Y. H. Rong & M. X. Zhang - 2014 - Philosophical Magazine 94 (12):1311-1326.
  7. Trust, Well-being and the Community of Philosophical Inquiry.Laura D'Olimpio - 2015 - He Kupu 4 (2):45-57.
    Trust is vital for individuals to flourish and have a sense of well-being in their community. A trusting society allows people to feel safe, communicate with each other and engage with those who are different to themselves without feeling fearful. In this paper I employ an Aristotelian framework in order to identify trust as a virtue and I defend the need to cultivate trust in children. I discuss the case study of Buranda State School in Queensland, Australia as an (...)
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  8. Game theoretic explanations and the evolution of justice.Justin D'Arms, Robert Batterman & Krzyzstof Górny - 1998 - Philosophy of Science 65 (1):76-102.
    Game theoretic explanations of the evolution of human behavior have become increasingly widespread. At their best, they allow us to abstract from misleading particulars in order to better recognize and appreciate broad patterns in the phenomena of human social life. We discuss this explanatory strategy, contrasting it with the particularist methodology of contemporary evolutionary psychology. We introduce some guidelines for the assessment of evolutionary game theoretic explanations of human behavior: such explanations should be representative, robust, and flexible. Distinguishing these (...)
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  9.  62
    The Fall of the Soul in Plato's Phaedrus.D. D. McGibbon - 1964 - Classical Quarterly 14 (01):56-.
    In the myth of the Phaedrus Plato sets forth a picture of the life of discarnate souls in heaven. He represents these souls by the symbol of a winged charioteer driving winged horses. In the case of the souls of the gods, the charioteers and horses are good. In the case of the other souls whom Plato calls daimones, and among whom our own souls are included, the soul is represented by a charioteer with two horses of which the right (...)
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  10.  8
    Hildebrand, Hypostasis, and the Irreducibility of Personal Existence.D. T. Sheffler - 2019 - Quaestiones Disputatae 10 (1):34-51.
    On one reading, twentieth century Christian personalists such as Max Scheler, Dietrich von Hildebrand, or Edith Stein merely translate into Christian terms a set of modern concerns that arise apart from and are at odds with the historical Christian tradition. According to this reading, modern philosophy makes a fundamental break with previous thinking when it turns inward to examine the interior, personal dimension of existence. A person who favors this inward turn will see the Christian personalists as vainly attempting to (...)
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  11.  61
    Hume's Missing Shade of Blue, Interpreted as Involving Habitual Spectra.D. M. Johnson - 1984 - Hume Studies 10 (2):109-124.
    In lieu of an abstract, here is a brief excerpt of the content:109 HUME'S MISSING SHADE OF BLUE, INTERPRETED AS INVOLVING HABITUAL SPECTRA David Hume claimed that his hypothetical case of the unseen shade of blue posed no fundamental problem to his general empiricist principle. But I believe it well may show exactly what he denied it showed — viz., that his empiricism rests on a mistake. Hume says: Suppose... a person to have enjoyed his sight for thirty years, and (...)
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  12.  19
    Jean Bodin, scepticism and absolute sovereignty.D. Engster - 1996 - History of Political Thought 17 (4):469-499.
    While by no means intending to discount the importance of historical circumstances in motivating Bodin to change his definition of sovereignty, I suggest an alternative way for understanding this change. I study Bodin's writings in the intellectual context of his times, and argue that he proposed his absolutist theory of sovereignty as a way to preserve a minimal point of universal and immutable order for politics in a social world that he perceived as highly disorderly, corrupt and changing. I (...)
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  13.  60
    Universally baire sets and definable well-orderings of the reals.Sy D. Friedman & Ralf Schindler - 2003 - Journal of Symbolic Logic 68 (4):1065-1081.
    Let n ≥ 3 be an integer. We show that it is consistent (relative to the consistency of n - 2 strong cardinals) that every $\Sigma_n^1-set$ of reals is universally Baire yet there is a (lightface) projective well-ordering of the reals. The proof uses "David's trick" in the presence of inner models with strong cardinals.
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  14. Chromatic diversity of natural scenes.J. M. M. Linhares, S. M. C. Nascimento, D. H. Foster & K. Amano - 2004 - In Robert Schwartz (ed.), Perception. Malden Ma: Blackwell. pp. 65-65.
    The number of discriminable colours is often assumed to be of the order of several million but the extent of detectable chromatic diversity present in individual natural scenes is an open question. Here, the aim was to estimate the number of discriminable colours seen in natural scenes. Hyperspectral data were obtained from a set of natural scenes over the range 400 - 720 nm at 10 nm intervals (Nascimento et al, 2002 Journal of the Optical Society of America A (...)
     
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  15.  18
    Universally Baire sets and definable well-orderings of the reals.S. Y. D. Friedman & Ralf Schindler - 2003 - Journal of Symbolic Logic 68 (4):1065-1081.
    Let n ≥ 3 be an integer. We show that it is consistent that every σ1n-set of reals is universally Baire yet there is a projective well-ordering of the reals. The proof uses “David’s trick” in the presence of inner models with strong cardinals.
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  16.  5
    A comparison of various analytic choice principles.Paul-Elliot Anglès D’Auriac & Takayuki Kihara - 2021 - Journal of Symbolic Logic 86 (4):1452-1485.
    We investigate computability theoretic and descriptive set theoretic contents of various kinds of analytic choice principles by performing a detailed analysis of the Medvedev lattice of $\Sigma ^1_1$ -closed sets. Among others, we solve an open problem on the Weihrauch degree of the parallelization of the $\Sigma ^1_1$ -choice principle on the integers. Harrington’s unpublished result on a jump hierarchy along a pseudo-well-ordering plays a key role in solving this problem.
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  17. Dimensions of scientific law.Sandra D. Mitchell - 2000 - Philosophy of Science 67 (2):242-265.
    Biological knowledge does not fit the image of science that philosophers have developed. Many argue that biology has no laws. Here I criticize standard normative accounts of law and defend an alternative, pragmatic approach. I argue that a multidimensional conceptual framework should replace the standard dichotomous law/ accident distinction in order to display important differences in the kinds of causal structure found in nature and the corresponding scientific representations of those structures. To this end I explore the dimensions of (...)
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  18.  67
    Do the ward notes reflect the quality of end-of-life care?D. P. Sulmasy, M. Dwyer & E. Marx - 1996 - Journal of Medical Ethics 22 (6):344-348.
    OBJECTIVES: To study the accuracy of reviewing ward notes (chart review) as a measure of the quality of care rendered to patients with "Do Not Resuscitate" (DNR) orders. DESIGN: We reviewed the charts of 19 consecutive, competent inpatients with DNR orders for evidence that the staff addressed a broad range of patient care needs called Concurrent Care Concerns (CCCs), such as withholding treatments other than resuscitation itself, and attention to patient comfort needs. We then interviewed the patient, consultant physician, house (...)
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  19. Thermal stability of solitons in protein α-helices.Danko D. Georgiev & James F. Glazebrook - 2022 - Chaos, Solitons and Fractals 155:111644.
    Protein α-helices provide an ordered biological environment that is conducive to soliton-assisted energy transport. The nonlinear interaction between amide I excitons and phonon deformations induced in the hydrogen-bonded lattice of peptide groups leads to self-trapping of the amide I energy, thereby creating a localized quasiparticle (soliton) that persists at zero temperature. The presence of thermal noise, however, could destabilize the protein soliton and dissipate its energy within a finite lifetime. In this work, we have computationally solved the system of stochastic (...)
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  20.  45
    Colloquium 3 Language as Technē vs. Language as Technology: Plato’s Critique of Sophistry.D. C. Schindler - 2019 - Proceedings of the Boston Area Colloquium of Ancient Philosophy 34 (1):85-108.
    This essay argues that the difference between philosophy and sophistical rhetoric that Plato presents in the Gorgias turns most fundamentally on different conceptions of the nature of language. After presenting some of the decisive moments in the debate between Socrates and Polus, Gorgias, and Callicles, this essay draws on the discussion of technē in Republic I to elucidate the “precise” sense of technē: namely, technē is ordered to the benefit of that over which it is set. The essay also draws (...)
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  21. The magic jewel of intuition: the tri-basic method of cognizing the self.D. B. Gangolli - 1986 - Holenarasipur: Adhyatma Prakasha Karyalaya. Edited by Satchidanandendra Saraswati.
    Can the totality of consciousness be found within the waking state? Can human consciousness be understood in its entirety by only considering the contents presented to us in the waking state? Why is the waking state so privileged? -/- This treatise from Indian author D.B. Gangolli presents the tri-basic method or the method of the three states of consciousness as the principle device or strategy employed in the science of Advaita Vedanta for arriving at knowledge and understanding of Ultimate Reality (...)
     
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  22.  10
    Computing coproducts of finitely presented Gödel algebras.Ottavio M. D’Antona & Vincenzo Marra - 2006 - Annals of Pure and Applied Logic 142 (1):202-211.
    We obtain an algorithm to compute finite coproducts of finitely generated Gödel algebras, i.e. Heyting algebras satisfying the prelinearity axiom =1. We achieve this result using ordered partitions of finite sets as a key tool to investigate the category opposite to finitely generated Gödel algebras . We give two applications of our main result. We prove that finitely presented Gödel algebras have free products with amalgamation; and we easily obtain a recursive formula for the cardinality of the free Gödel algebra (...)
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  23.  25
    Decidability of ∃*∀∀-sentences in HF.D. Bellè & F. Parlamento - 2008 - Notre Dame Journal of Formal Logic 49 (1):55-64.
    Let HF be the collection of the hereditarily finite well-founded sets and let the primitive language of set theory be the first-order language which contains binary symbols for equality and membership only. As announced in a previous paper by the authors, "Truth in V for ∃*∀∀-sentences is decidable," truth in HF for ∃*∀∀-sentences of the primitive language is decidable. The paper provides the proof of that claim.
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  24. Bridging emotion theory and neurobiology through dynamic systems modeling.Marc D. Lewis - 2005 - Behavioral and Brain Sciences 28 (2):169-194.
    Efforts to bridge emotion theory with neurobiology can be facilitated by dynamic systems (DS) modeling. DS principles stipulate higher-order wholes emerging from lower-order constituents through bidirectional causal processes cognition relations. I then present a psychological model based on this reconceptualization, identifying trigger, self-amplification, and self-stabilization phases of emotion-appraisal states, leading to consolidating traits. The article goes on to describe neural structures and functions involved in appraisal and emotion, as well as DS mechanisms of integration by which they interact. (...)
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  25.  22
    Probabilistic Entailment on First Order Languages and Reasoning with Inconsistencies.R. A. D. Soroush Rafiee - 2023 - Review of Symbolic Logic 16 (2):351-368.
    We investigate an approach for drawing logical inference from inconsistent premisses. The main idea in this approach is that the inconsistencies in the premisses should be interpreted as uncertainty of the information. We propose a mechanism, based on Kinght’s [14] study of inconsistency, for revising an inconsistent set of premisses to a minimally uncertain, probabilistically consistent one. We will then generalise the probabilistic entailment relation introduced in [15] for propositional languages to the first order case to draw logical inference (...)
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  26.  22
    Non enim ab hiis que sensus est iudicare sensum: Sensation and Thought in Theaetetus, Plotinus and Proclus.D. Gregory MacIsaac - 2014 - International Journal of the Platonic Tradition 8 (2):192-230.
    I examine the relation between sensation and discursive thought in Plato, Plotinus, and Proclus. In Theaetetus, a soul whose highest faculty was sensation would have no unified experience of the sensible world, lacking universal ideas to give order to the sensible flux. It is implied that such universals are grasped by the soul’s thinking. In Plotinus the soul is not passive when it senses the world, but as the logos of all things it thinks the world through its own (...)
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  27.  9
    Love and the postmodern predicament: rediscovering the real in beauty, goodness, and truth.D. C. Schindler - 2018 - Eugene, Oregon: Cascade Books.
    The computer has increasingly become the principal model for the mind, which means our most basic experience of ""reality"" is as mediated through a screen, or stored in a cloud. As a result, we are losing a sense of the concrete and imposing presence of the real, and the fundamental claim it makes on us, a claim that Iris Murdoch once described as the essence of love. In response to this postmodern predicament, the present book aims to draw on the (...)
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  28.  11
    Нація як історія, пам’ять, мова, культура.D. I. Dzvinchuk & I. D. Ozminska - 2018 - Гуманітарний Вісник Запорізької Державної Інженерної Академії 74:13-27.
    The article presents a systematic and detailed account of scholarly developments on the problem of studying the process of nation-building and the role of history, memory, language and culture in reflecting this process. The research reveals that according to the premordialist approach, nations are not formed instantaneously, by the relevant political will or by coincidence of circumstances; the process of creating and consolidating a nation is a long and meaningful one, full of historical events and national cultural tokens. The primordialist (...)
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  29. Designing Academic Conferences in the Light of Second-Order Cybernetics.L. D. Richards - 2015 - Constructivist Foundations 11 (1):65-73.
    Context: A tension exists between the needs and desires of the institutions providing the funding for academics to attend conferences and the potential for transforming the knowledge and understanding of conference participants - than in advancing their own careers and celebrity. Approaches to the problem can recognize the importance of funding and career-building in the current society, while still experimenting in ways that could generate new ideas. Method: Ideas from second-order cybernetics are used to derive design principles that might (...)
     
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  30.  20
    Causality in Macroeconomics.Kevin D. Hoover & Kevin D. Autor Hoover - 2001 - Cambridge University Press.
    Causality in Macroeconomics examines causality while taking macroeconomics seriously. A pragmatic and realistic philosophy is joined to a macroeconomic foundation that refines Herbert Simon's well-known work on causal order to make a case for a structural approach to causality. The structural approach is used to understand modern rational expectations models, regime switching models, Granger causality, vector autoregressions, the Lucas critique, and concept exogeneity. Techniques of causal inference based on patterns of stability and instability in the face of identified (...)
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  31.  38
    Modal deduction in second-order logic and set theory - II.Johan van Benthem, Giovanna D'Agostino, Angelo Montanari & Alberto Policriti - 1998 - Studia Logica 60 (3):387-420.
    In this paper, we generalize the set-theoretic translation method for poly-modal logic introduced in [11] to extended modal logics. Instead of devising an ad-hoc translation for each logic, we develop a general framework within which a number of extended modal logics can be dealt with. We first extend the basic set-theoretic translation method to weak monadic second-order logic through a suitable change in the underlying set theory that connects up in interesting ways with constructibility; then, we show how to (...)
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  32.  27
    "Out of the Order of Number": Benjamin and Irigaray Toward a Politics of Pure Means.Peter D. Fenves - 1998 - Diacritics 28 (1):43-58.
    In lieu of an abstract, here is a brief excerpt of the content:“Out of the Order of Number”: Benjamin and Irigaray Toward a Politics of Pure MeansPeter Fenves* (bio)At the heart of the legal orders that arose in conjunction with the Enlightenment idea of law as rules of conduct universally applicable to all those who belong to a properly instituted political body lies a formula for the justification of the violence on which the law depends in order for (...)
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  33.  26
    A Valuation Theoretic Characterization of Recursively Saturated Real Closed Fields.Paola D’Aquino, Salma Kuhlmann & Karen Lange - 2015 - Journal of Symbolic Logic 80 (1):194-206.
    We give a valuation theoretic characterization for a real closed field to be recursively saturated. This builds on work in [9], where the authors gave such a characterization forκ-saturation, for a cardinal$\kappa \ge \aleph _0 $. Our result extends the characterization of Harnik and Ressayre [7] for a divisible ordered abelian group to be recursively saturated.
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  34.  42
    On conflicts between ethical and logical principles in artificial intelligence.Giuseppe D’Acquisto - 2020 - AI and Society 35 (4):895-900.
    Artificial intelligence is nowadays a reality. Setting rules on the potential outcomes of intelligent machines, so that no surprise can be expected by humans from the behavior of those machines, is becoming a priority for policy makers. In its recent Communication “Artificial Intelligence for Europe”, for instance, the European Commission identifies the distinguishing trait of an intelligent machine in the presence of “_a certain degree of autonomy_” in decision making, in the light of the context. The crucial issue to be (...)
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  35.  85
    Nordenfelt's theory of disability.Steven D. Edwards - 1998 - Theoretical Medicine and Bioethics 19 (1):89-100.
    This paper is an attempt to provide a critical evaluation of the theory of disability put forward by Lennart Nordenfelt. The paper is in five sections. The first sets out the main elements of Nordenfelt's theory. The second section elaborates the theory further, identifies a tension in the theory, and three kinds of problems for it. The tension derives from Nordenfelt's attempt to respect two important but conflicting constraints on a theory of health. The problems derive from characterisation of the (...)
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  36.  26
    Modal Deduction in Second-Order Logic and Set Theory: II.Johan van Benthem, Giovanna D'agostino, Angelo Montanari & Alberto Policriti - 1998 - Studia Logica 60 (3):387 - 420.
    In this paper, we generalize the set-theoretic translation method for polymodal logic introduced in [11] to extended modal logics. Instead of devising an ad-hoc translation for each logic, we develop a general framework within which a number of extended modal logics can be dealt with. We first extend the basic set-theoretic translation method to weak monadic second-order logic through a suitable change in the underlying set theory that connects up in interesting ways with constructibility; then, we show how to (...)
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  37.  79
    Greatly Erdős cardinals with some generalizations to the Chang and Ramsey properties.I. Sharpe & P. D. Welch - 2011 - Annals of Pure and Applied Logic 162 (11):863-902.
    • We define a notion of order of indiscernibility type of a structure by analogy with Mitchell order on measures; we use this to define a hierarchy of strong axioms of infinity defined through normal filters, the α-weakly Erdős hierarchy. The filters in this hierarchy can be seen to be generated by sets of ordinals where these indiscernibility orders on structures dominate the canonical functions.• The limit axiom of this is that of greatly Erdős and we use it (...)
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  38. Plato on Knowledge as a Power.Nicholas D. Smith - 2000 - Journal of the History of Philosophy 38 (2):145-168.
    In lieu of an abstract, here is a brief excerpt of the content:Plato on Knowledge as a Power1Nicholas D. SmithAt 471C4 in Plato’s Republic, the argument takes a sudden turn when Glaucon becomes impatient with all of the specific prescriptions Socrates has been making, and asks to return to the issue Socrates had earlier set aside—whether or not the city he was describing could ever be brought into being. In response to Glaucon’s impatient question, Socrates articulates his “third wave of (...)
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  39.  77
    Ultimate truth vis- à- vis stable truth.P. D. Welch - 2008 - Review of Symbolic Logic 1 (1):126-142.
    We show that the set of ultimately true sentences in Hartry Field's Revenge-immune solution model to the semantic paradoxes is recursively isomorphic to the set of stably true sentences obtained in Hans Herzberger's revision sequence starting from the null hypothesis. We further remark that this shows that a substantial subsystem of second-order number theory is needed to establish the semantic values of sentences in Field's relative consistency proof of his theory over the ground model of the standard natural numbers: (...)
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  40.  46
    On Provability Logics with Linearly Ordered Modalities.Lev D. Beklemishev, David Fernández-Duque & Joost J. Joosten - 2014 - Studia Logica 102 (3):541-566.
    We introduce the logics GLP Λ, a generalization of Japaridze’s polymodal provability logic GLP ω where Λ is any linearly ordered set representing a hierarchy of provability operators of increasing strength. We shall provide a reduction of these logics to GLP ω yielding among other things a finitary proof of the normal form theorem for the variable-free fragment of GLP Λ and the decidability of GLP Λ for recursive orderings Λ. Further, we give a restricted axiomatization of the variable-free fragment (...)
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  41.  44
    Logic by Way of Set Theory. [REVIEW]D. Z. T. - 1969 - Review of Metaphysics 22 (3):568-568.
    This book is designed for an introductory course in logic on the freshman-sophomore level. The approach to logic through set theory is justified by the fundamental importance of set theory in mathematics, and by the fact that most students entering college are acquainted with set theory. The author begins by explaining the basic notions and laws of set theory, and shows how the four standard types of propositions are translated into the notation of set theory. Propositional logic is introduced and (...)
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  42.  6
    On the existence of large antichains for definable quasi-orders.Benjamin D. Miller & Zoltán Vidnyánszky - 2020 - Journal of Symbolic Logic 85 (1):103-108.
    We simultaneously generalize Silver’s perfect set theorem for co-analytic equivalence relations and Harrington-Marker-Shelah’s Dilworth-style perfect set theorem for Borel quasi-orders, establish the analogous theorem at the next definable cardinal, and give further generalizations under weaker definability conditions.
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  43.  18
    On weak filters and ultrafilters: Set theory from (and for) knowledge representation.Costas D. Koutras, Christos Moyzes, Christos Nomikos, Konstantinos Tsaprounis & Yorgos Zikos - 2023 - Logic Journal of the IGPL 31 (1):68-95.
    Weak filters were introduced by K. Schlechta in the ’90s with the aim of interpreting defaults via a generalized ‘most’ quantifier in first-order logic. They arguably represent the largest class of structures that qualify as a ‘collection of large subsets’ of a given index set |$I$|⁠, in the sense that it is difficult to think of a weaker, but still plausible, definition of the concept. The notion of weak ultrafilter naturally emerges and has been used in epistemic logic and (...)
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  44. Family physicians' and general practitioners' approaches to drug management of diabetic hypertension in primary care.Khalid A. J. Al Khaja PhD, Reginald P. Sequeira PhD, Vijay S. Mathur M. D. D. Phil Fams, Awatif H. H. Damanhori MBBCh & Abdul Wahab M. Abdul Wahab Frcs - 2002 - Journal of Evaluation in Clinical Practice 8 (1):19-30.
    Rationale, aims and objectives To compare the pharmacotherapeutic approaches to diabetic hypertension of family physicians (FPs) and general practitioners (GPs). Methods A retrospective prescription-based study was conducted in 15 out of a total of 20 health centres, involving 115 primary care physicians – 77 FPs and 38 GPs, representing 74% of the primary care physicians of Bahrain. Prescriptions were collected during May and June 2000 to comprise a study population of 1266 diabetic-hypertensive patients. Results As monotherapy, angiotensin-converting enzyme (ACE) inhibitors (...)
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  45.  53
    Fifty years of the spectrum problem: survey and new results.Arnaud Durand, Neil D. Jones, Johann A. Makowsky & Malika More - 2012 - Bulletin of Symbolic Logic 18 (4):505-553.
    In 1952, Heinrich Scholz published a question in The Journal of Symbolic Logic asking for a characterization of spectra, i.e., sets of natural numbers that are the cardinalities of finite models of first order sentences. Günter Asser in turn asked whether the complement of a spectrum is always a spectrum. These innocent questions turned out to be seminal for the development of finite model theory and descriptive complexity. In this paper we survey developments over the last 50-odd years pertaining (...)
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  46.  29
    On unfoldable cardinals, ω-closed cardinals, and the beginning of the inner model hierarchy.P. D. Welch - 2004 - Archive for Mathematical Logic 43 (4):443-458.
    Let κ be a cardinal, and let H κ be the class of sets of hereditary cardinality less than κ ; let τ (κ) > κ be the height of the smallest transitive admissible set containing every element of {κ}∪H κ . We show that a ZFC-definable notion of long unfoldability, a generalisation of weak compactness, implies in the core model K, that the mouse order restricted to H κ is as long as τ. (It is known that some (...)
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  47.  31
    Nonfinite axiomatizability results for cylindric and relation algebras.Roger D. Maddux - 1989 - Journal of Symbolic Logic 54 (3):951-974.
    The set of equations which use only one variable and hold in all representable relation algebras cannot be derived from any finite set of equations true in all representable relation algebras. Similar results hold for cylindric algebras and for logic with finitely many variables. The main tools are a construction of nonrepresentable one-generated relation algebras, a method for obtaining cylindric algebras from relation algebras, and the use of relation algebras in defining algebraic semantics for first-order logic.
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  48. Translating the hypergame paradox: Remarks on the set of founded elements of a relation. [REVIEW]Claudio Bernardi & Giovanna D'Agostino - 1996 - Journal of Philosophical Logic 25 (5):545 - 557.
    In Zwicker (1987) the hypergame paradox is introduced and studied. In this paper we continue this investigation, comparing the hypergame argument with the diagonal one, in order to find a proof schema. In particular, in Theorems 9 and 10 we discuss the complexity of the set of founded elements in a recursively enumerable relation on the set N of natural numbers, in the framework of reduction between relations. We also find an application in the theory of diagonalizable algebras and (...)
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  49. Quantum transport and utilization of free energy in protein α-helices.Danko D. Georgiev & James F. Glazebrook - 2020 - Advances in Quantum Chemistry 82:253-300.
    The essential biological processes that sustain life are catalyzed by protein nano-engines, which maintain living systems in far-from-equilibrium ordered states. To investigate energetic processes in proteins, we have analyzed the system of generalized Davydov equations that govern the quantum dynamics of multiple amide I exciton quanta propagating along the hydrogen-bonded peptide groups in α-helices. Computational simulations have confirmed the generation of moving Davydov solitons by applied pulses of amide I energy for protein α-helices of varying length. The stability and (...)
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  50.  11
    D -completions and the d -topology.Klaus Keimel & Jimmie D. Lawson - 2009 - Annals of Pure and Applied Logic 159 (3):292-306.
    In this article we give a general categorical construction via reflection functors for various completions of T0-spaces subordinate to sobrification, with a particular emphasis on what we call the -completion, a type of directed completion introduced by Wyler [O. Wyler, Dedekind complete posets and Scott topologies, in: B. Banaschewski, R.-E. Hoffmann , Continuous Lattices Proceedings, Bremen 1979, in: Lecture Notes in Mathematics, vol. 871, Springer Verlag, 1981, pp. 384–389]. A key result is that all completions of a certain type are (...)
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