Results 1 to 10 of about 538 (137)
Central types of convex fragments of the perfect Jonsson theory [PDF]
Қарағанды университетінің хабаршысы. Математика сериясы, 2019 In this paper, the central types of convex fragments of the perfect Jonsson theory are considered. The main goal of this paper is to redefine the A.D.
A.R. Yeshkeyev, M.T. Omarova
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Сompanions of (n1, n2)-Jonsson theory [PDF]
Қарағанды университетінің хабаршысы. Математика сериясы, 2019 In given work are considered model - theoretical properties of companions of (n1; n2) - Jonsson theory. Also were considered a communications between center and (n1; n2) - Jonsson theory.
A.R. Yeshkeyev, M.T. Omarova
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Connection between the amalgam and joint embedding properties [PDF]
Қарағанды университетінің хабаршысы. Математика сериясы, 2022 The paper aims to study the model-theoretic properties of differentially closed fields of zero and positive characteristics in framework of study of Jonsson theories.
A.R. Yeshkeyev +2 more
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Similarities of Jonsson spectra’s classes [PDF]
Қарағанды университетінің хабаршысы. Математика сериясы, 2023 The study of syntactic and semantic properties of a first-order language, generally speaking, for incomplete theories, is one of the urgent problems of mathematical logic.
A.R. Yeshkeyev +2 more
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Chains of existentially closed models of positive (n1, n2)-Jonsson theories [PDF]
Қарағанды университетінің хабаршысы. Математика сериясы, 2019 In this article are considered model - theoretical properties of chains of positive ( n1,n2) - Jonsson theories. Herewith considered theories is perfect in the sense of the existence of appropriate model companion.
A.R. Yeshkeyev, M.T. Omarova
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Small models of convex fragments of definable subsets [PDF]
Қарағанды университетінің хабаршысы. Математика сериясы, 2020 This article discusses the problems of that part of Model Theory that studies the properties of countable models of inductive theories with additional properties, or, in other words, Jonsson theories.
A.R. Yeshkeyev, N.V. Popova
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Connection of Jonsson theory with some Jonsson polygons theories
Қарағанды университетінің хабаршысы. Математика сериясы, 2019 This article presents the result related to the model - theoretic properties of special subsets of the semantic model of some fixed Jonsson theory. The specialty of these sets is due to their definability and closure.
A.R. Yeshkeyev, G.A. Urken
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Existentially prime Jonsson quasivarieties and their Jonsson spectra
Қарағанды университетінің хабаршысы. Математика сериясы, 2022 This article is devoted to the study of Jonsson quasivarieties in a signature enriched with new predicate and constant symbols. New concepts of semantic Jonsson quasivariety and fragment-conservativeness of the center of the Jonsson theory are ...
A. R. Yeshkeyev +2 more
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Existentially positive Mustafin theories of S-acts over a group
Қарағанды университетінің хабаршысы. Математика сериясы, 2022 The paper is connected with the study of Jonsson spectrum notion of the fixed class of models of Sacts signature, assuming a group as a monoid of S-acts.
A.R. Yeshkeyev +2 more
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Forcing companions of Jonsson AP-theories
Қарағанды университетінің хабаршысы. Математика сериясы, 2022 This article is devoted to the study of the forcing companions of the Jonsson AP-theories in the enriched signature. It is proved that the forcing companion of the theory does not change when expanding the theories under consideration, which have some ...
A.R. Yeshkeyev +2 more
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