Results 11 to 20 of about 20,636 (126)

Central types of convex fragments of the perfect Jonsson theory

BULLETIN OF THE KARAGANDA UNIVERSITY-MATHEMATICS, 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. Taimanov’s question for complete theories in the sphere of Jonsson fragments of formula -definable subsets of a Jonsson fixed theory’s semantic model.
A.R. Yeshkeyev, M.T. Omarova
doaj   +5 more sources

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, I.O. Tungushbayeva, M.T. Kassymetova   +2 more
doaj   +3 more sources

Conditional Versus Unconditional Covariate Effects in Pharmacometric Models: Implications for Interpretation, Communication, and Reporting. [PDF]

CPT Pharmacometrics Syst Pharmacol
ABSTRACT This work investigates how correlations between covariates influence the estimation of their effects in pharmacometric models. The focus is on quantifying the impact on conditional and unconditional covariate effect estimates and assessing the consequences for model interpretation, communication, and dosing recommendations.
Jonsson EN, Jönsson S, Hansson E, Nyberg J.   +3 more
europepmc   +2 more sources

Adaptive Pruning for Increased Robustness and Reduced Computational Overhead in Gaussian Process Accelerated Saddle Point Searches. [PDF]

Chemphyschem
Optimal Transport: A permutation‐invariant "harness" measures true geometric distance improves performance and robustness. Gaussian process (GP) regression provides a strategy for accelerating saddle point searches on high‐dimensional energy surfaces by reducing the number of times the energy and its derivatives with respect to atomic coordinates need ...
Goswami R, Jónsson H.
europepmc   +2 more sources

Cooling Out or Branching Out? Accounting for the Aspirations-Attainment Paradox Among Immigrant Youth in Sweden. [PDF]

Br J Sociol
ABSTRACT In Sweden, as in many countries, immigrant youth tend to exhibit higher educational aspirations than native‐born youth, yet their attainment often falls short of their greater ambitions. This study, resulting from a research project focused on educational transitions in two Swedish municipalities, explores two mechanisms that help explain the ...
Voyer A, Lund S.
europepmc   +2 more sources

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, I. O. Tungushbayeva, S. M. Amanbekov   +2 more
doaj   +1 more source

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, O.I. Ulbrikht, A.R. Yarullina   +2 more
doaj   +1 more source

Similarities of Jonsson spectra’s classes

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, O.I. Ulbrikht, G.A. Urken   +2 more
doaj   +1 more source

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, I.O. Tungushbayeva, M.T. Omarova   +2 more
doaj   +1 more source

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
doaj   +1 more source