Results for 'László Hajnal'

799 found
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  1.  51
    An epigenetic machine. [REVIEW]Fatima Cvrčková, Eduard Gajdoš, László Hajnal & Anton Markoš - 2003 - Sign Systems Studies 31 (2):605-616.
  2.  40
    Hajnal András und Kalmár László. Megjegyzés a halmazelmélet Gödel-féle axiómarendszeréhez . Ebd., Bd. 7 , S. 26–42, 218–229. [REVIEW]R. Péter - 1957 - Journal of Symbolic Logic 22 (3):296-296.
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  3.  28
    Hajnal András and Kalmár László. An elementary combinatorial theorem with an application to axiomatic set theory. Publicationes mathematlcae , vol. 4 , pp. 431–449.Burger E.. Eine Bemerkung zur Bernays-Godel-Mengenlehre. Zeitschrift für mathematische Logik und Grundlagen der Mathematik, vol. 4 , pp. 178–179. [REVIEW]Azriel Levy - 1960 - Journal of Symbolic Logic 25 (4):354-354.
  4.  17
    Critical Commentary on Ervin Laszlo’s Paper “In Defense of Intuition”.Ervin Laszlo - 2010 - Journal of Scientific Exploration 23 (3).
    Dr. Laszlo’s hypothesis (2009) is in my opinion appealing on many levels. He proposes that phenomena of apparent transpersonal communication between human beings are due to the intermediary of information-carrying holograms in the reactive quantum vacuum produced by human brain activity. He also suggests that valid information regarding the world in general is available through the same mechanism, on the grounds that all material objects “excite the ground state of the [zero point] fi eld” and produce further such holograms. On (...)
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  5. (1 other version)A logic for theories in flux Laszlo Polos and Michael T. Hannan.Laszlo Polos - 2004 - Logique Et Analyse 185 (47):85-121.
     
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  6.  66
    Mutual definability does not imply definitional equivalence, a simple example.Hajnal Andréka, Judit X. Madarász & István Németi - 2005 - Mathematical Logic Quarterly 51 (6):591-597.
    We give two theories, Th1 and Th2, which are explicitly definable over each other , but are not definitionally equivalent. The languages of the two theories are disjoint.
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  7.  39
    Complexity of equations valid in algebras of relations part I: Strong non-finitizability.Hajnal Andréka - 1997 - Annals of Pure and Applied Logic 89 (2):149-209.
    We study algebras whose elements are relations, and the operations are natural “manipulations” of relations. This area goes back to 140 years ago to works of De Morgan, Peirce, Schröder . Well known examples of algebras of relations are the varieties RCAn of cylindric algebras of n-ary relations, RPEAn of polyadic equality algebras of n-ary relations, and RRA of binary relations with composition. We prove that any axiomatization, say E, of RCAn has to be very complex in the following sense: (...)
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  8.  31
    Testing Definitional Equivalence of Theories Via Automorphism Groups.Hajnal Andréka, Judit Madarász, István Németi & Gergely Székely - 2024 - Review of Symbolic Logic 17 (4):1097-1118.
    Two first-order logic theories are definitionally equivalent if and only if there is a bijection between their model classes that preserves isomorphisms and ultraproducts (Theorem 2). This is a variant of a prior theorem of van Benthem and Pearce. In Example 2, uncountably many pairs of definitionally inequivalent theories are given such that their model categories are concretely isomorphic via bijections that preserve ultraproducts in the model categories up to isomorphism. Based on these results, we settle several conjectures of Barrett, (...)
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  9. Modal Languages and Bounded Fragments of Predicate Logic.Hajnal Andréka, István Németi & Johan van Benthem - 1998 - Journal of Philosophical Logic 27 (3):217 - 274.
    What precisely are fragments of classical first-order logic showing “modal” behaviour? Perhaps the most influential answer is that of Gabbay 1981, which identifies them with so-called “finite-variable fragments”, using only some fixed finite number of variables (free or bound). This view-point has been endorsed by many authors (cf. van Benthem 1991). We will investigate these fragments, and find that, illuminating and interesting though they are, they lack the required nice behaviour in our sense. (Several new negative results support this claim.) (...)
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  10.  85
    A Systems View of Ervin Laszlo, from One Generation to the Next: An Edited and Annotated Autobiographical Piece.Alexander Laszlo, Christopher Laszlo & Ervin Laszlo - 2011 - World Futures 67 (4-5):219 - 243.
    This article represents a concerted Laszlo effort. What you will find here is a collection of autobiographical reflections written by Ervin Laszlo that speaks to his involvement with the field of systems thinking and his impact on it, interspersed with comments and illustrative examples on points of special interest. As such, this essay should be read as a reflection piece?one in which a new generation of Laszlos muse on the power and inspiration of the vision that has served as a (...)
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  11. Internet Use and Healthcare.László Ropolyi - 2021 - In Dagmar Eigner (ed.), Wahrnehmung, Kommunikation und Resonanz. Beiträge zur Medical Anthropology, Band 4. Perception, Communication, and Resonance. Contributions to Medical Anthropology, Volume 4. Schriftenreihe der Landesverteidigungsakademie. pp. 173-192.
    The medical use of computing and information and communication technologies (ICTs) has a history of several decades, but the emergence of the internet, and especially the web and social media, created a new situation. As a result, currently the term eHealth is widely used – and the usage of the internet (and mobile) “technologies” in healthcare (among the patients and professionals, too) tends to be usual practice. There are more and more signs of the institutionalization of this new sub-disciplinary field (...)
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  12.  20
    The evolutionary outrider: the impact of the human agent on evolution: essays honoring Ervin Laszlo.Ervin Laszlo & David Loye (eds.) - 1998 - Westport, Conn.: Praeger.
    Illustrates how the theory of evolution can be expanded into a source of social guidance.
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  13. A logic road from special relativity to general relativity.Hajnal Andréka, Judit X. Madarász, István Németi & Gergely Székely - 2012 - Synthese 186 (3):633 - 649.
    We present a streamlined axiom system of special relativity in first-order logic. From this axiom system we "derive" an axiom system of general relativity in two natural steps. We will also see how the axioms of special relativity transform into those of general relativity. This way we hope to make general relativity more accessible for the non-specialist.
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  14.  91
    Omitting types for finite variable fragments and complete representations of algebras.Hajnal Andréka, István Németi & Tarek Sayed Ahmed - 2008 - Journal of Symbolic Logic 73 (1):65-89.
    We give a novel application of algebraic logic to first order logic. A new, flexible construction is presented for representable but not completely representable atomic relation and cylindric algebras of dimension n (for finite n > 2) with the additional property that they are one-generated and the set of all n by n atomic matrices forms a cylindric basis. We use this construction to show that the classical Henkin-Orey omitting types theorem fails for the finite variable fragments of first order (...)
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  15.  20
    Three-Space from Quantum Mechanics.László B. Szabados - 2022 - Foundations of Physics 52 (5):1-34.
    The spin geometry theorem of Penrose is extended from SU to E invariant elementary quantum mechanical systems. Using the natural decomposition of the total angular momentum into its spin and orbital parts, the distance between the centre-of-mass lines of the elementary subsystems of a classical composite system can be recovered from their relative orbital angular momenta by E-invariant classical observables. Motivated by this observation, an expression for the ‘empirical distance’ between the elementary subsystems of a composite quantum mechanical system, given (...)
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  16.  62
    Virtuality and Reality—Toward a Representation Ontology.László Ropolyi - 2015 - Philosophies 1 (1):40--54.
    Based on a brief overview of the history of ontology and on some philosophical problems of virtual reality, a new approach to virtuality is proposed. To characterize the representational technologies in the Internet age, I suggest that Aristotle’s dualistic ontological system be complemented with a third form of being: virtuality. In the virtual form of being actuality and potentiality are inseparably intertwined. Virtuality is potentiality considered together with its actualization. In this view, virtuality is reality with a measure, a reality (...)
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  17. The Sellarsian Fate of Mental Fictionalism.László Kocsis & Krisztián Pete - 2022 - In Tamás Demeter, T. Parent & Adam Toon (eds.), Mental Fictionalism: Philosophical Explorations. New York & London: Routledge. pp. 127-146.
    This chapter argues that mental fictionalism can only be a successful account of our ordinary folk-psychological practices if it can in some way preserve its original function, namely its explanatory aspect. A too strong commitment to the explanatory role moves fictionalism unacceptably close to the realist or eliminativist interpretation of folk psychology. To avoid this, fictionalists must degrade or dispense with this explanatory role. This motivation behind the fictionalist movement seems to be rather similar to that of Sellars when he (...)
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  18.  71
    On a consistency theorem connected with the generalized continuum problem.András Hajnal - 1956 - Mathematical Logic Quarterly 2 (8-9):131-136.
  19.  17
    Ethics in the Economy: Handbook of Business Ethics / Edited by Laszlo Zsolnai.László Zsolnai (ed.) - 2004 - P. Lang.
    The book aims to provide a comprehensive, new look at business ethics topics and models from a European perspective. Apart from theoretical arguments and empirical data, case studies and games are used to get closer to real life problematics of business. The book is written by leading business ethics professors of the Community of European Management Schools (CEMS). Chapters of the handbook first describe the central issue and the latest theories and practices. They then introduce new approaches and analyze real (...)
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  20. Completeness of Floyd logic.Hajnal Andreka & Istvan Nemeti - 1978 - Bulletin of the Section of Logic 7 (3):115-119.
    This is an abstract of our paper \A characterisation of Floyd-provable programs" submitted to Theoretical Computer Science. ! denotes the set of natural numbers. Y =d fyi : i 2 !g is the set of variable symbols. L denotes the set of classical rst order formulas of type t possibly with free variables , where t is the similarity type of arithmetic, i.e. it consists of \+; ; 0; 1" with arities \2; 2; 0; 0".
     
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  21.  69
    Relativised quantification: Some canonical varieties of sequence-set algebras.Hajnal Andreka, Robert Goldblatt & Istvan Nemeti - 1998 - Journal of Symbolic Logic 63 (1):163-184.
  22. In: A. Havlicek – F. Karfík (szerk.): Plato’s Theaetetus. Proceedings of the Sixth Symposium Platonicum Pragense, OIKOUMENH, Prague, 2008, 217-249.László Bene (ed.) - 2008
     
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  23.  18
    Het analyseren van partij-rangschikkingen via het 'exploded logit'-model.Istvan Hajnal & Bart Maddens - 1997 - Res Publica 39 (3):423-438.
    Rankings of politicalparties are often used to map the multiple party preference of the electorate. This article shows how the obtained rankings may be analysed by means of the exploded logit-technique, which allows for testing both the difference between the rankings and the effect of either categorical or quantitative independent variables on the rankings. An analysis of the effect of age on the party preference rankings of the christian democratie electorate in the 1991 Belgian parliamentary election shows that the older (...)
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  24.  27
    Some higher-gap examples in combinatorial set theory.A. Hajnal & P. Komjáth - 1987 - Annals of Pure and Applied Logic 33 (C):283-296.
  25.  15
    (1 other version)Über ein Problem, betreffend die Definition des Begriffes der allgemein‐rekursiven Funktion.László Kalmár - 1955 - Mathematical Logic Quarterly 1 (2):93-96.
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  26.  76
    “Rethink”: Fundamental Aspects of Sustainable Development.Hajnal Klara - 2009 - World Futures 65 (5-6):330-341.
  27.  35
    (1 other version)Diskussion über den modernen begriff Des proletariats und der arbeiterklasse in der sowjetischen fachliteratur.Laszlo Révész - 1971 - Studies in East European Thought 11 (4):250-275.
  28.  9
    Negative Dialektik als geistige Erfahrung?László Tengelyi - 2012 - Phänomenologische Forschungen 2012:47-65.
    Adorno describes Bergson and Husserl as the proper originators of philosophical modernity. What is characteristic of the initiatives these thinkers take is, according to him, an essay in breaking out both from the philosophical systems of idealism and from neo-Kantian formalism. It is shown in the present paper that Adorno’s own project to elaborate a negative dialectics can be understood as a continuation, or re-enactment, of this Ausbruchsversuch of his great predecessors. Moreover, in one of his lecture courses given in (...)
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  29.  38
    Meaning, Truth, and Physics.Laszlo E. Szabo - unknown
    A physical theory is a partially interpreted axiomatic formal system, where L is a formal language with some logical, mathematical and physical axioms, and with some derivation rules, and the semantics S is a relationship between the formulas of L and some states of affairs in the physical world. In our ordinary discourse, the formal system L is regarded as an abstract object or structure, the semantics S as something which involves the mental/conceptual realm. This view is of course incompatible (...)
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  30.  5
    The survival imperative: upshifting to conscious evolution: a guide to returning peace and harmony to the planet.Ervin Laszlo - 2023 - Fort Lauderdale, FL: Light on Light Press.
    With humanity facing its greatest series of simultaneous crises, leading systems thinker Ervin Laszlo offers the solutions that will ensure the wellbeing of society at all levels and of our planetary home. Providing a holistic context to where we are and how we got here, he assures us that evolution unfolds in a nonlinear, fluctuating fashion. What is called for at this critical juncture - as our sacred task - is a phase of upshift to higher levels of order and (...)
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  31.  26
    Meaningfulness Beats Frequency in Multiword Chunk Processing.Hajnal Jolsvai, Stewart M. McCauley & Morten H. Christiansen - 2020 - Cognitive Science 44 (10):e12885.
    Whereas a growing bulk of work has demonstrated that both adults and children are sensitive to frequently occurring word sequences, little is known about the potential role of meaning in the processing of such multiword chunks. Here, we take a first step toward assessing the contribution of meaningfulness in the processing of multiword sequences, using items that varied in chunk meaningfulness. In a phrasal-decision study, we compared reaction times for triads of three-word sequences, corresponding to idiomatic expressions, compositional phrases, and (...)
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  32.  99
    Axiomatizing relativistic dynamics without conservation postulates.Hajnal Andréka, Judit Madarász X., István Németi & Gergely Székely - 2008 - Studia Logica 89 (2):163 - 186.
    A part of relativistic dynamics is axiomatized by simple and purely geometrical axioms formulated within first-order logic. A geometrical proof of the formula connecting relativistic and rest masses of bodies is presented, leading up to a geometric explanation of Einstein’s famous E = mc 2. The connection of our geometrical axioms and the usual axioms on the conservation of mass, momentum and four-momentum is also investigated.
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  33. Expressibility of properties of relations.Hajnal Andréka, Ivo Düntsch & István Németi - 1995 - Journal of Symbolic Logic 60 (3):970-991.
    We investigate in an algebraic setting the question of which logical languages can express the properties integral, permutational, and rigid for algebras of relations.
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  34.  30
    The moral economic man.Laszlo Zsolnai - forthcoming - Ethics in the Economy: Handbook of Business Ethics, Forthcoming.
  35.  22
    A Note on Penrose’s Spin-Geometry Theorem and the Geometry of ‘Empirical Quantum Angles’.László B. Szabados - 2022 - Foundations of Physics 52 (4):1-12.
    In the traditional formalism of quantum mechanics, a simple direct proof of the Spin Geometry Theorem of Penrose is given; and the structure of a model of the ‘space of the quantum directions’, defined in terms of elementary SU-invariant observables of the quantum mechanical systems, is sketched.
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  36.  5
    Hungary.Laszlo Zsolnai - 2024 - Business and Professional Ethics Journal 43 (3):295-327.
    The paper presents the state of the art of business ethics teaching, research, and training in Hungary. It reviews the most important publications by Hungarian authors on business ethics issues since 2011. It identifies the most striking business ethics related problems in Hungary. It maps the important activities, topics and issues in business ethics teaching and research in Hungary and reports on the themes in training on business ethics. Also, the paper reflects on the main business ethics related issues that (...)
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  37.  15
    Melancholy.Laszlo F. Foldenyi - 2016 - Yale University Press.
    _A leading European intellectual reflects on the changing concept of melancholy throughout history_ Alberto Manguel praises the Hungarian writer László Földényi as “one of the most brilliant essayists of our time.” Földényi’s extraordinary _Melancholy_, with its profusion of literary, ecclesiastical, artistic, and historical insights, gives proof to such praise. His book, part history of the term _melancholy_ and part analysis of the melancholic disposition, explores many centuries to explore melancholy’s ambiguities. Along the way Földényi discovers the unrecognized role melancholy (...)
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  38.  22
    The Pluralist and Possibilist Aspect of the Scientific Enterprise.Ervin Laszlo - 1973 - Philosophy and Phenomenological Research 34 (2):279-281.
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  39.  60
    'Explicating ways of consensus-making: Distinguishing the academic, the interface and the meta-consensus.Laszlo Kosolosky & Jeroen Van Bouwel - 2014 - In Martini Carlo (ed.), Experts and Consensus in Social Science. Springer. pp. 71-92.
  40.  34
    Representations for Small Relation Algebras.Hajnal Andréka & Roger D. Maddux - 1994 - Notre Dame Journal of Formal Logic 35 (4):550-562.
    There are eighteen isomorphism types of finite relation algebras with eight or fewer elements, and all of them are representable. We determine all the cardinalities of sets on which these algebras have representations.
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  41.  37
    Can Autonomous Agents Without Phenomenal Consciousness Be Morally Responsible?László Bernáth - 2021 - Philosophy and Technology 34 (4):1363-1382.
    It is an increasingly popular view among philosophers that moral responsibility can, in principle, be attributed to unconscious autonomous agents. This trend is already remarkable in itself, but it is even more interesting that most proponents of this view provide more or less the same argument to support their position. I argue that as it stands, the Extension Argument, as I call it, is not sufficient to establish the thesis that unconscious autonomous agents can be morally responsible. I attempt to (...)
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  42. Evil and the god of indifference.László Bernáth & Daniel Kodaj - 2020 - International Journal for Philosophy of Religion 88 (3):259-272.
    The evidential problem of evil involves a rarely discussed challenge, namely the challenge of defending theism against the hypothesis of a morally indifferent creator. Our argument uses a Bayesian framework and it starts by showing that if the only alternative to classical theism is naturalistic atheism, then fine-tuning can render theism virtually certain, even in the face of evil. But if the alternatives include the hypothesis of a morally indifferent creator, theism is defeated even if the fine-tuning premise is accepted. (...)
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  43.  22
    Paul Ricœur und die Theorie der narrativen Identität.László Tengelyi - 2013 - Allgemeine Zeitschrift für Philosophie 38 (3):263-280.
    Anticipated by several thinkers of the Western philosophical tradition over a long period of time, the theory of narrative identity was ultimately put forward in the 1980s by philosophers like Alasdair MacIntyre, Paul Ricoeur, Charles Taylor, David Carr and others. In the present paper, an attempt is made to give a survey of the process in which this theory was integrated into contemporary philosophy during the last two and a half decades. It is pointed out that, even in analytic philosophy, (...)
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  44. Natural Substances and Artificial Products.Pierre Laszlo - 1995 - Diogenes 43 (172):105-125.
    One of the defining features of the modern age is the apotheosis of natural history. Natural History is, of course, the title of Buffon's monumental work, written in the second half of the 18th century. Also, until the rise of the Industrial Revolution, natural history provided an integrated technology, stretching from the voyages of discovery to the establishment of colonies devoted to the cultivation of the resources discovered there, whether one considers sugar cane in its migration west, or vanilla plants (...)
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  45.  98
    A recursive core for partition function form games.László Á Kóczy - 2007 - Theory and Decision 63 (1):41-51.
    We present a well-defined generalisation of the core to coalitional games with externalities, where the value of a deviation is given by an endogenous response, the solution (if nonempty: the core) of the residual game.
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  46.  62
    Not all representable cylindric algebras are neat reducts.Hajnal Andréka & István Németi - 1979 - Bulletin of the Section of Logic 8 (3):145-147.
  47.  53
    On universal algebraic logic and cylindric algebras.Hajnal Andréka & István Németi - 1978 - Bulletin of the Section of Logic 7 (4):152-158.
  48. Program verification within and without logic.Hajnal Andreka, Istvan Nemeti & Ildiko Sain - 1979 - Bulletin of the Section of Logic 8 (3):124-128.
    Theorem 1 states a negative result about the classical semantics j= ! of program schemes. Theorem 2 investigates the reason for this. We conclude that Theorem 2 justies the Henkin-type semantics j= for which the opposite of the present Theorem 1 was proved in [1]{[3] and also in a dierent form in part III of [5]. The strongest positive result on j= is Corollary 6 in [3].
     
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  49. Quasi Equational Logic Of Partial Algebras.Hajnal Andreka, Peter Burmeister & Istvan Nemeti - 1980 - Bulletin of the Section of Logic 9 (4):193-197.
     
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  50.  26
    Representations for small relation algebras.Hajnal Andr Eka & Roger D. Maddux - 1994 - Notre Dame Journal of Formal Logic 35 (4).
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