Results 1 to 10 of about 17,727 (164)

Linearly Stratified Models for the Foundations of Nonstandard Mathematics [PDF]

open access: yesMathematical Logic Quarterly, 1998
AbstractAssuming the existence of an inaccessible cardinal, transitive full models of the whole set theory, equipped with a linearly valued rank function, are constructed. Such models provide a global framework for nonstandard mathematics.
Mauro Di Nasso
exaly   +3 more sources

Nonstandard Models and Kripke's Proof of the Gödel Theorem

open access: yesNotre Dame Journal of Formal Logic, 2000
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
exaly   +4 more sources

Educational gradients in nonstandard work schedules among mothers and fathers in the United Kingdom

open access: yesDemographic Research, 2021
Background: Mothers' and fathers' participation in nonstandard employment across children's lives is not well understood in the United Kingdom. Objective: The first objective is to describe the prevalence of nonstandard work schedules (e.g., evenings,
Afshin Zilanawala
doaj   +1 more source

How does working nonstandard hours impact psychological resources important for parental functioning? Evidence from an Australian longitudinal cohort study

open access: yesSSM: Population Health, 2021
This study investigates the link between nonstandard schedules and three psychological resources salient to working parents' parental functioning (psychological distress, work-family conflict and relationship quality).
Yixuan Zhao   +4 more
doaj   +1 more source

Numerical treatments for some stochastic–deterministic chaotic systems

open access: yesResults in Physics, 2022
We aim in this paper to propose classes of nonlinear ordinary differential equations based on the concept of piecewise differentiation. These classes are known as piecewise deterministic–stochastic differential equations or vice versa.
N.H. Sweilam   +4 more
doaj   +1 more source

An Application of Nonstandard Finite Difference Method to a Model Describing Diabetes Mellitus and Its Complications

open access: yesJournal of New Theory, 2023
In this study, a mathematical model describing diabetes mellitus and its complications in a population is considered. Since standard numerical methods can lead to numerical instabilities, it aims to solve the problem using a nonstandard method. Among the
İlkem Turhan Çetinkaya
doaj   +1 more source

Non-Standard Discrete RothC Models for Soil Carbon Dynamics

open access: yesAxioms, 2021
Soil Organic Carbon (SOC) is one of the key indicators of land degradation. SOC positively affects soil functions with regard to habitats, biological diversity and soil fertility; therefore, a reduction in the SOC stock of soil results in degradation ...
Fasma Diele   +2 more
doaj   +1 more source

A definable nonstandard model of the reals [PDF]

open access: yesJournal of Symbolic Logic, 2004
AbstractWe prove, in ZFC, the existence of a definable, countably saturated elementary extension of the reals.
Vladimir Kanovei, Saharon Shelah
openaire   +3 more sources

A hybrid fractional optimal control for a novel Coronavirus (2019-nCov) mathematical model

open access: yesJournal of Advanced Research, 2021
Introduction: Coronavirus COVID-19 pandemic is the defining global health crisis of our time and the greatest challenge we have faced since world war two. To describe this disease mathematically, we noted that COVID-19, due to uncertainties associated to
N.H. Sweilam   +2 more
doaj   +1 more source

Nonstandard Finite Difference Method Applied to a Linear Pharmacokinetics Model

open access: yesBioengineering, 2017
We extend the nonstandard finite difference method of solution to the study of pharmacokinetic–pharmacodynamic models. Pharmacokinetic (PK) models are commonly used to predict drug concentrations that drive controlled intravenous (I.V.) transfers (or ...
Oluwaseun Egbelowo   +2 more
doaj   +1 more source

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