Results 21 to 30 of about 4,021 (211)

Method of the rheostat for studying properties of fragments of theoretical sets

Қарағанды университетінің хабаршысы. Математика сериясы, 2020
In this article discusses the model-theoretical properties of fragments of theoretical sets and the rheostat method. These two concepts: theoretical set and rheostat are new. The study of this topic in the framework of the study of Jonsson theories, the
A.R. Yeshkeyev
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An essential base of the central types of the convex theory

Қарағанды университетінің хабаршысы. Математика сериясы, 2021
In this paper, we consider the model-theoretical properties of the essential base of the central types of convex theory. Also shows the connection between the center and Jonsson theory in permissible enrichment signatures.
A.R. Yeshkeyev, M.T. Omarova
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Small models of convex fragments of definable subsets

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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An algebra of the central types of the mutually model-consistent fragments

Қарағанды университетінің хабаршысы. Математика сериясы, 2021
In this paper, the model-theoretical properties of the algebra of central types of mutually model-consistent fragments are considered. Also, the connections between the center and the Jonsson theory in the permissible signature enrichment are shown, and
A.R. Yeshkeyev, N.M. Mussina
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On Robinson spectrum of the semantic Jonsson quasivariety of unars [PDF]

Қарағанды университетінің хабаршысы. Математика сериясы, 2023
Given article is devoted to the study of semantic Jonsson quasivariety of universal unars of signature containing only unary functional symbol. The first section of the article consists of basic necessary concepts.
A.R. Yeshkeyev, A.R. Yarullina, S.M. Amanbekov, M.T. Kassymetova   +3 more
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The admissibility and similarity of Jonsson theories

BULLETIN OF THE KARAGANDA UNIVERSITY-MATHEMATICS, 2018
This work is related to the concepts of admissibility, interpretability, syntactic similarity and semantic similarity of Jonsson’s theories.This new concept generalize the notion of syntactic and semantic similarities for Jonsson theories. In the frame of study of preservation of the definable formulas subsets of Jonsson theory’s semantic model ...
A.R. Yeshkeyev, G.A. Urken
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Properties of hybrids of Jonsson theories

BULLETIN OF THE KARAGANDA UNIVERSITY-MATHEMATICS, 2018
This work is an introduction to the study of the properties of a new concept, as a hybrid of Jonsson theories. We define the basic concepts and framework for studying the model-theoretic properties of these concepts. The main goal of this paper is to study the model-theoretic properties of companions of hybrids of Jonsson theories.
A.R. Yeshkeyev, N.M. Mussina
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Syntactic similarity of definable closures of Jonsson sets

Қарағанды университетінің хабаршысы. Математика сериясы, 2018
In the framework of the classification of the Jonsson theories concept of interpretability and admissibility in the language of the semantic triple of the Jonsson theory was considered.
G.A. Urken
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Small models of hybrids for special subclasses of Jonsson theories

BULLETIN OF THE KARAGANDA UNIVERSITY-MATHEMATICS, 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. Further, we consider fragments of these sets and create a hybrid of these fragments from them.
A.R. Yeshkeyev, N.M. Mussina
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Double factorization of the Jonsson spectrum

Қарағанды университетінің хабаршысы. Математика сериясы
First of all, we have to note that in this article, we introduced the new concepts of relations between Jonsson theories in the class of cosemanticness for some considered Jonsson spectrum.
A.R. Yeshkeyev, O.I. Ulbrikht, M.T. Omarova   +2 more
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