Results for 'O. Wagner'

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  1. Quasi-o-Minimal Structures.Oleg Belegradek, Ya'acov Peterzil & Frank Wagner - 2000 - Journal of Symbolic Logic 65 (3):1115-1132.
    A structure (M, $ ,...) is called quasi-o-minimal if in any structure elementarily equivalent to it the definable subsets are exactly the Boolean combinations of 0-definable subsets and intervals. We give a series of natural examples of quasi-o-minimal structures which are not o-minimal; one of them is the ordered group of integers. We develop a technique to investigate quasi-o-minimality and use it to study quasi-o-minimal ordered groups (possibly with extra structure). Main results: any quasi-o-minimal ordered group is abelian; any quasi-o-minimal (...)
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  2.  28
    "Plotinus: An Introduction to the Enneads", by Dominic J. O'Meara. [REVIEW]Michael F. Wagner - 1995 - Ancient Philosophy 15 (1):307.
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  3.  8
    Review of J. O'Neill, Worlds Without Content: Against Formalism[REVIEW]Steven J. Wagner - 1996 - Philosophia Mathematica 4 (3).
  4. 1. On Ad Hoc Hypotheses On Ad Hoc Hypotheses (Pp. 1-14).J. Christopher Hunt, Kareem Khalifa, Ryan Muldoon, Tony Smith, Michael Weisberg, Michelle G. Gibbons, Elliott O. Wagner & Andreas Wagner - 2012 - Philosophy of Science 79 (1).
     
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  5.  19
    Coset-Minimal Groups.Oleg Belegradek, Viktor Verbovskiy & Frank O. Wagner - 2003 - Annals of Pure and Applied Logic 121 (2-3):113-143.
    A totally ordered group G is called coset-minimal if every definable subset of G is a finite union of cosets of definable subgroups intersected with intervals with endpoints in G{±∞}. Continuing work in Belegradek et al. 1115) and Point and Wagner 261), we study coset-minimality, as well as two weak versions of the notion: eventual and ultimate coset-minimality. These groups are abelian; an eventually coset-minimal group, as a pure ordered group, is an ordered abelian group of finite regular rank. (...)
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  6.  5
    Essentially Periodic Ordered Groups.Françoise Point & Frank O. Wagner - 2000 - Annals of Pure and Applied Logic 105 (1-3):261-291.
    A totally ordered group G is essentially periodic if for every definable non-trivial convex subgroup H of G every definable subset of G is equal to a finite union of cosets of subgroups of G on some interval containing an end segment of H; it is coset-minimal if all definable subsets are equal to a finite union of cosets, intersected with intervals. We study definable sets and functions in such groups, and relate them to the quasi-o-minimal groups introduced in Belegradek (...)
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  7.  63
    Deterministic Chaos and the Evolution of Meaning.Elliott O. Wagner - 2012 - British Journal for the Philosophy of Science 63 (3):547-575.
    Common wisdom holds that communication is impossible when messages are costless and communicators have totally opposed interests. This article demonstrates that such wisdom is false. Non-convergent dynamics can sustain partial information transfer even in a zero-sum signalling game. In particular, I investigate a signalling game in which messages are free, the state-act payoffs resemble rock–paper–scissors, and senders and receivers adjust their strategies according to the replicator dynamic. This system exhibits Hamiltonian chaos and trajectories do not converge to equilibria. This persistent (...)
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  8.  40
    Evolving to Divide the Fruits of Cooperation.Elliott O. Wagner - 2012 - Philosophy of Science 79 (1):81-94.
  9.  32
    Conventional Semantic Meaning in Signalling Games with Conflicting Interests.Elliott O. Wagner - 2015 - British Journal for the Philosophy of Science 66 (4):751-773.
    Lewis signalling games are often used to explain how it is possible for simple agents to develop systems of conventional semantic meaning. In these games, all players obtain identical payoffs in every outcome. This is an unrealistic payoff structure, but it is often employed because it is thought that semantic meaning will not emerge if interests conflict. Here it is shown that not only is conventional meaning possible when interests conflict, but it is the most likely outcome in a finite (...)
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  10.  37
    Nurse Middle Manager Ethical Dilemmas and Moral Distress.F. D. Ganz, N. Wagner & O. Toren - 2015 - Nursing Ethics 22 (1):43-51.
  11.  14
    Prediction of Attendance at Fitness Center: A Comparison Between the Theory of Planned Behavior, the Social Cognitive Theory, and the Physical Activity Maintenance Theory.Darko Jekauc, Manuel Vã¶Lkle, Matthias O. Wagner, Filip Mess, Miriam Reiner & Britta Renner - 2015 - Frontiers in Psychology 6.
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  12. Liftez Les Sylows! Une Suite À "Sous-Groupes Périodiques d'Un Groupe Stable".Bruno Poizat & Frank O. Wagner - 2000 - Journal of Symbolic Logic 65 (2):703-704.
    If G is an omega-stable group with a normal definable subgroup H, then the Sylow-2-subgroups of G/H are the images of the Sylow-2-subgroups of G. /// Sei G eine omega-stabile Gruppe und H ein definierbarer Normalteiler von G. Dann sind die Sylow-2-Untergruppen von G/H Bilder der Sylow-2-Untergruppen von G.
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  13. Deus Ex Machina: A Cautionary Tale for Naturalists.Cailin O'Connor, Nathan Fulton, Elliott Wagner & P. Kyle Stanford - 2012 - Analyse & Kritik 34 (1):51-62.
    In this paper we critically examine and seek to extend Philip Kitcher’s Ethical Project to weave together a distinctive naturalistic conception of how ethics came to occupy the place it does in our lives and how the existing ethical project should be revised and extended into the future. Although we endorse his insight that ethical progress is better conceived of as the improvement of an existing state than an incremental approach towards a fixed endpoint, we nonetheless go on to argue (...)
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  14. Quasi-Endomorphisms in Small Stable Groups.Frank O. Wagner - 1993 - Journal of Symbolic Logic 58 (3):1044-1051.
    We generalise various properties of quasiendomorphisms from groups with regular generic to small abelian groups. In particular, for a small abelian group such that no infinite definable quotient is connected-by-finite, the ring of quasi-endomorphisms is locally finite. Under some additional assumptions, it decomposes modulo some nil ideal into a sum of finitely many matrix rings.
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  15.  16
    Ample Thoughts.Daniel Palacín & Frank O. Wagner - 2013 - Journal of Symbolic Logic 78 (2):489-510.
    Non-$n$-ampleness as defined by Pillay [20] and Evans [5] is preserved under analysability. Generalizing this to a more general notion of $\Sigma$-ampleness, this gives an immediate proof for all simple theories of a weakened version of the Canonical Base Property (CBP) proven by Chatzidakis [4] for types of finite SU-rank. This is then applied to the special case of groups.
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  16.  10
    Constructing an Almost Hyperdefinable Group.Itay Ben-Yaacov, Ivan Tomašić & Frank O. Wagner - 2004 - Journal of Mathematical Logic 4 (02):181-212.
    This paper completes the proof of the group configuration theorem for simple theories started in [1]. We introduce the notion of an almost hyperdefinable structure, and show that it has a reasonable model theory. We then construct an almost hyperdefinable group from a polygroup chunk.
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  17.  19
    Supersimple Ω-Categorical Groups and Theories.David M. Evans & Frank O. Wagner - 2000 - Journal of Symbolic Logic 65 (2):767-776.
    An ω-categorical supersimple group is finite-by-abelian-by-finite, and has finite SU-rank. Every definable subgroup is commensurable with an acl( $\emptyset$ )-definable subgroup. Every finitely based regular type in a CM-trivial ω-categorical simple theory is non-orthogonal to a type of SU-rank 1. In particular, a supersimple ω-categorical CM-trivial theory has finite SU-rank.
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  18.  66
    Brian Skyrms Signals: Evolution, Learning, and Information. [REVIEW]Elliott O. Wagner & Michael Franke - 2013 - British Journal for the Philosophy of Science 64 (4):axt004.
  19.  3
    Applications of the Group Configuration Theorem in Simple Theories.Ivan Tomašić & Frank O. Wagner - 2003 - Journal of Mathematical Logic 3 (02):239-255.
    We reconstruct the group action in the group configuration theorem. We apply it to show that in an ω-categorical theory a finitely based pseudolinear regular type is locally modular, and the geometry associated to a finitely based locally modular regular type is projective geometry over a finite field.
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  20.  23
    The Group Configuration in Simple Theories and its Applications.Itay Ben-Yaacov, Ivan Tomašić & Frank O. Wagner - 2002 - Bulletin of Symbolic Logic 8 (2):283-298.
    In recent work, the authors have established the group configuration theorem for simple theories, as well as some of its main applications from geometric stability theory, such as the binding group theorem, or in the $\omega$-categorical case, the characterization of the forking geometry of a finitely based non-trivial locally modular regular type as projective geometry over a finite field and the equivalence of pseudolinearity and local modularity. The proof necessitated an extension of the model-theoretic framework to include almost hyperimaginaries, and (...)
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  21.  6
    Stable Theories Without Dense Forking Chains.Bernhard Herwig, James G. Loveys, Anand Pillay, Predag Tanović & O. Wagner - 1992 - Archive for Mathematical Logic 31 (5):297-303.
    We define a generalized notion of rank for stable theories without dense forking chains, and use it to derive that every type is domination-equivalent to a finite product of regular types. We apply this to show that in a small theory admitting finite coding, no realisation of a nonforking extension of some strong type can be algebraic over some realisation of a forking extension.
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  22.  10
    Local Supersimplicity and Related Concepts.Enrique Casanovas & Frank O. Wagner - 2002 - Journal of Symbolic Logic 67 (2):744-758.
    We study local strengthenings of the simplicity condition. In particular, we define and study a local Lascar rank, as well as short, low, supershort and superlow theories. An example of a low, non supershort theory is given.
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  23.  7
    Small Stable Groups and Generics.Frank O. Wagner - 1991 - Journal of Symbolic Logic 56 (3):1026-1037.
    We define an $\mathfrak{R}$-group to be a stable group with the property that a generic element can only be algebraic over a generic. We then derive some corollaries for $\mathfrak{R}$-groups and fields, and prove a decomposition theorem and a field theorem. As a nonsuperstable example, we prove that small stable groups are $\mathfrak{R}$-groups.
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  24.  8
    On Almost Orthogonality in Simple Theories.Itay Ben-Yaacov & Frank O. Wagner - 2004 - Journal of Symbolic Logic 69 (2):398 - 408.
    1. We show that if p is a real type which is internal in a set $\sigma$ of partial types in a simple theory, then there is a type p' interbounded with p, which is finitely generated over $\sigma$ , and possesses a fundamental system of solutions relative to $\sigma$ . 2. If p is a possibly hyperimaginary Lascar strong type, almost \sigma-internal$ , but almost orthogonal to $\sigma^{\omega}$ , then there is a canonical non-trivial almost hyperdefinable polygroup which multi-acts (...)
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  25.  11
    Nilpotent Complements and Carter Subgroups in Stable ℜ-Groups.Frank O. Wagner - 1994 - Archive for Mathematical Logic 33 (1):23-34.
    The following theorems are proved about the Frattini-free componentG Φ of a soluble stable ℜ-group: a) If it has a normal subgroupN with nilpotent quotientG Φ/N, then there is a nilpotent subgroupH ofG Φ withG Φ=NH. b) It has Carter subgroups; if the group is small, they are all conjugate. c) Nilpotency modulo a suitable Frattini-subgroup (to be defined) implies nilpotency. The last result makes use of a new structure theorem for the centre of the derivative of the Frattini-free component (...)
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  26.  19
    CM-Triviality and Stable Groups.Frank O. Wagner - 1998 - Journal of Symbolic Logic 63 (4):1473-1495.
    We define a generalized version of CM-triviality, and show that in the presence of enough regular types, or solubility, a stable CM-trivial group is nilpotent-by-finite. A torsion-free small CM-trivial stable group is abelian and connected. The first result makes use of a generalized version of the analysis of bad groups.
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  27.  21
    Minimal Fields.Frank O. Wagner - 2000 - Journal of Symbolic Logic 65 (4):1833-1835.
    A minimal field of non-zero characteristic is algebraically closed.
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  28.  6
    More on ${\Germ R}$.Frank O. Wagner - 1992 - Notre Dame Journal of Formal Logic 33 (2):159-174.
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  29.  27
    Small Stable Groups and Generics.Frank O. Wagner - 1991 - Journal of Symbolic Logic 56 (3):1026-1037.
    We define an R-group to be a stable group with the property that a generic element (for any definable transitive group action) can only be algebraic over a generic. We then derive some corollaries for R-groups and fields, and prove a decomposition theorem and a field theorem. As a nonsuperstable example, we prove that small stable groups are R-groups.
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  30.  9
    Stable Groups, Mostly of Finite Exponent.Frank O. Wagner - 1993 - Notre Dame Journal of Formal Logic 34 (2):183-192.
  31.  4
    Friedman, Sy D. And VeliCkovit, B., Al-Definability.I. Hodkinson, R. Kaye, I. Korec, F. Maurin, H. Mildenberger & F. O. Wagner - 1997 - Annals of Pure and Applied Logic 89 (1):277.
  32.  17
    On the Binding Group in Simple Theories.Ziv Shami & Frank O. Wagner - 2002 - Journal of Symbolic Logic 67 (3):1016-1024.
    We show that if p is a real type which is almost internal in a formula φ in a simple theory, then there is a type p' interalgebraic with a finite tuple of realizations of p, which is generated over φ. Moreover, the group of elementary permutations of p' over all realizations of φ is type-definable.
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  33.  15
    Small Fields.Frank O. Wagner - 1998 - Journal of Symbolic Logic 63 (3):995-1002.
    An infinite field with only countably many pure types is algebraically closed.
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  34.  11
    A Propos E'equations Generiques.Frank O. Wagner - 1992 - Journal of Symbolic Logic 57 (2):548-554.
    We prove that a stable solvable group $G$ which satisfies $x^n = 1$ generically is of finite exponent dividing some power of $n$. Furthermore, $G$ is nilpotent-by-finite. A second result is that in a stable group of finite exponent, involutions either have big centralisers, or invert a subgroup of finite index (which hence has to be abelian).
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  35.  4
    À Propos d'Équations Génériques.Frank O. Wagner - 1992 - Journal of Symbolic Logic 57 (2):548-554.
    We prove that a stable solvable group G which satisfies xn = 1 generically is of finite exponent dividing some power of n. Furthermore, G is nilpotent-by-finite. A second result is that in a stable group of finite exponent, involutions either have big centralisers, or invert a subgroup of finite index (which hence has to be abelian).
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  36.  17
    Supersimplicity and Quadratic Extensions.A. Martin-Pizarro & F. O. Wagner - 2009 - Archive for Mathematical Logic 48 (1):55-61.
    An elliptic curve over a supersimple field with exactly one extension of degree 2 has an s-generic point.
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  37.  13
    Commutator Conditions and Splitting Automorphisms for Stable Groups.Frank O. Wagner - 1993 - Archive for Mathematical Logic 32 (3):223-228.
    We show that a stable groupG satisfying certain commutator conditions is nilpotent. Furthermore, a soluble stable group with generically splitting automorphism of prime order is nilpotent-by-finite. In particular, a soluble stable group with a generic element of prime order is nilpotent-by-finite.
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  38.  13
    Elimination of Hyperimaginaries and Stable Independence in Simple CM-Trivial Theories.D. Palacín & F. O. Wagner - 2013 - Notre Dame Journal of Formal Logic 54 (3-4):541-551.
    In a simple CM-trivial theory every hyperimaginary is interbounded with a sequence of finitary hyperimaginaries. Moreover, such a theory eliminates hyperimaginaries whenever it eliminates finitary hyperimaginaries. In a supersimple CM-trivial theory, the independence relation is stable.
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  39.  9
    Plus Ultra.Frank O. Wagner - 2015 - Journal of Mathematical Logic 15 (2):1550008.
    We define a reasonably well-behaved class of ultraimaginaries, i.e. classes modulo [Formula: see text]-invariant equivalence relations, called tame, and establish some basic simplicity-theoretic facts. We also show feeble elimination of supersimple ultraimaginaries: If [Formula: see text] is an ultraimaginary definable over a tuple [Formula: see text] with [Formula: see text], then [Formula: see text] is eliminable up to rank [Formula: see text]. Finally, we prove some uniform versions of the weak canonical base property.
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  40.  11
    A Note on Defining Groups in Stable Structures.Frank O. Wagner - 1994 - Journal of Symbolic Logic 59 (2):575-578.
    If * is a binary partial function which happens to be a group law on some infinite subset of some model of a stable theory, then this subset can be embedded into a definable group such that * becomes the group operation.
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  41.  6
    À la Recherche du Tore Perdu.Thomas Blossier, Amador Martin-Pizarro & Frank O. Wagner - 2016 - Journal of Symbolic Logic 81 (1):1-31.
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  42.  9
    Extinction After Partial Reinforcement and Minimal Learning as a Test of Both Verbal Control and Pre in Concept Learning.Daniel C. O'connell & Margaret V. Wagner - 1967 - Journal of Experimental Psychology 73 (1):151.
  43.  6
    On the Structure of Stable Groups.Frank O. Wagner - 1997 - Annals of Pure and Applied Logic 89 (1):85-92.
    In this paper, we shall survey results about the group-theoretic properties of stable groups. These can be classified into three main categories, according to the strength of the assumptions needed: chain conditions, generic types, and some form of rank. Each category has its typical application: Chain conditions often allow us to deduce global properties from local ones, generic properties are used to get definable groups from undefinable ones, and rank is necessary to interpret fields in certain group actions. While originally (...)
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  44.  5
    Social Reformers: Adam Smith to John Dewey.Donald O. Wagner - 1934 - Journal of Philosophy 31 (10):278-278.
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  45. Some Inevitable Reflections.Frank O. Wagner - 2013 - Archive for Mathematical Logic 52 (1-2):159 - 171.
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  46.  52
    Realistic Opinion Aggregation: Lehrer-Wagner with a Finite Set of Opinion Values.R. Bradley & C. Wagner - 2012 - Episteme 9 (2):91-99.
    An allocation problem is a type of aggregation problem in which the values of individuals' opinions on some set of variables sum to a constant. This paper shows that for realistic allocation problems, namely ones in which the set of possible opinion values is finite, the only universal aggregation methods that satisfy two commonly invoked conditions are the dictatorial ones. The two conditions are, first, that the aggregate opinion on any variable depends only on the individuals' opinions on that variable (...)
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  47. "I Still Maintain That This Session Should Have Been Called" An Evening with Alfred Schutz," Maybe with the Addition in Small Print:" as Seen Through the Re-Presentations of His Student Helmut Wagner.Helmut R. Wagner - 1985 - Human Studies 8 (33).
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  48. Chonggyo, Simch'ŭng Ŭl Poda: O Kang-Nam Kyosu Ka Mannan Yŏngsŏng Ŭi Kŏindŭl.Kang-nam O. - 2011 - Hyŏnamsa.
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  49.  50
    O Beethoven-Schrift: Richard Wagner teórico.Henry Burnett - 2009 - Trans/Form/Ação 32 (1):159-173.
    Quando consideramos a extensão da obra dramática de Richard Wagner, não causa estranheza que seus textos teóricos sejam praticamente desconhecidos. No entanto, um de seus escritos, intitulado Beethoven, influenciou decisivamente a elaboração de um livro famoso, hoje considerado um capítulo importante da história da estética, O nascimento da tragédia. Este artigo pretende analisar este escrito de Wagner na intenção de desvendar o que pode ter sido tão determinante na leitura que Nietzsche fez dele, e que o levou ao (...)
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  50.  6
    Frank O. Wagner. Simple Theories. Mathematics and its Applications, Vol. 503. Kluwer Academic Publishers, Dordrecht, Boston, and London, 2000, Xi + 260 Pp. [REVIEW]Bradd Hart - 2002 - Bulletin of Symbolic Logic 8 (4):522-524.
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