Results 31 to 40 of about 6,353 (239)

Model-theoretical questions of the Jonsson spectrum

Қарағанды университетінің хабаршысы. Математика сериясы, 2020
In this paper, new concepts are defined in the framework of the study of Jonsson spectrum. We consider a spectrum with respect to the concept of cosemanticness, which is a generalization of elementary equivalence in the class of inductive, generally ...
A.R. Yeshkeyev
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The properties of central types with respect to enrichment by Jonsson set

Қарағанды университетінің хабаршысы. Математика сериясы, 2017
The main results of the article are for a new class of theories, namely existential prime strongly convex Jonsson theories. This class is quite broad in terms of algebra, for example it includes the class of all Abelian groups and groups.
A.R. Yeshkeyev
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Properties of lattices of the existential formulas of Jonsson fragments

Қарағанды университетінің хабаршысы. Математика сериясы, 2015
This article is devoted to studying of the properties of model - theoretic concepts of a fragment of the Jonsson sets and their application to the lattices of existential formulas.
A.R. Yeshkeyev, M.T. Kasymetova
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Existentially positive Mustafin theories of S-acts over a group [PDF]

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, O.I. Ulbrikht, A.R. Yarullina   +2 more
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Geometry of strongly minimal hybrids of fragments of theoretical sets [PDF]

Қарағанды университетінің хабаршысы. Математика сериясы, 2023
In this article, strongly minimal geometries of fragment hybrids are considered. In this article, a new concept was introduced as a family of Jonsson definable subsets of the semantic model of the Jonsson theory T, denoted by JDef(CT).
M.T. Kassymetova, N.M. Mussina
doaj   +2 more sources

Independence and simplicity in Jonsson theories with abstract geometry

Sibirskie Elektronnye Matematicheskie Izvestiya, 2021
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Yeshkeyev, Aibat Rafhatovich, Kassymetova, Maira Technikovna, Ulbrikht, Olga Ivanovna   +2 more
openaire   +3 more sources

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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Discussion: “An Enclosure Theory for Radiative Exchange Between Specularly and Diffusely Reflecting Surfaces” (Sparrow, E. M., Eckert, E. R. G., and Jonsson, V. K., 1962, ASME J. Heat Transfer, 84, pp. 294–299) [PDF]

Journal of Heat Transfer, 1962
exaly   +2 more sources

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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