# A mathematical model of the critical Coronavirus Disease (Covid-19) situation in Thailand during March 2021 to August 2021

## Authors

• Khanitin Muangchoo-in Fixed Point Research Laboratory, Center of Excellence in Theoretical and Computational Science, Faculty of Science, King Mongkut’s University of Technology Thonburi, Thung Khru, Bangkok 10140, Thailand, Department of Mathematics, Faculty of Science, King Mongkut’s University of Technology Thonburi, Thung Khru, Bangkok 10140, Thailand
• Parinya Sa-Ngiamsunthorn Department of Mathematics, Faculty of Science, King Mongkut’s University of Technology Thonburi, Thung Khru, Bangkok 10140, Thailand, Center of Excellence in Theoretical and Computational Science, Faculty of Science, King Mongkut’s University of Technology Thonburi, Thung Khru, Bangkok 10140, Thailand
• Poom Kumam Fixed Point Research Laboratory, Center of Excellence in Theoretical and Computational Science, Faculty of Science, King Mongkut’s University of Technology Thonburi, Thung Khru, Bangkok 10140, Thailand, Center of Excellence in Theoretical and Computational Science, Faculty of Science, King Mongkut’s University of Technology Thonburi, Thung Khru, Bangkok 10140, Thailand

## Keywords:

Coronavirus, Equilibrium problem, Fixed point iteration, Green function

## Abstract

In this article, the authors introduce a mathematical model of the critical Coronavirus Disease (Covid-19) situation in Thailand during March 2021 to August 2021. The work is divided into three parts. Firstly, the model is formulated with a description of the parameters defined in the model, the we compute the basic reproduction number (R0) and study the locally asymptotically stability of its disease free equilibrium point, the existence of endemic equilibrium point, and locally and globally asymptotically stability of its endemic equilibrium point. Secondly, we present a strategy using fixed point iterative methods for solving a nonlinear dynamical problem in form of Green’s function for analysis of the parameters, the existence and convergence theorems of solutions are shown by the fixed point theorem techniques. Finally, the authors show the numerical to predict the future situation of coronavirus disease in Thailand contain R0 and give the conclusion of this work.

2022-12-31

## How to Cite

Khanitin Muangchoo-in, Parinya Sa-Ngiamsunthorn, & Poom Kumam. (2022). A mathematical model of the critical Coronavirus Disease (Covid-19) situation in Thailand during March 2021 to August 2021. Science & Technology Asia, 27(4), 215–227. Retrieved from https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/247952

## Section

Physical sciences