The fractional-order discrete COVID-19 pandemic model: stability and chaos.
Nonlinear Dyn
; : 1-19, 2022 Aug 15.
Article
in English
| MEDLINE | ID: covidwho-2238258
ABSTRACT
This paper presents and investigates a new fractional discrete COVID-19 model which involves three variables the new daily cases, additional severe cases and deaths. Here, we analyze the stability of the equilibrium point at different values of the fractional order. Using maximum Lyapunov exponents, phase attractors, bifurcation diagrams, the 0-1 test and approximation entropy (ApEn), it is shown that the dynamic behaviors of the model change from stable to chaotic behavior by varying the fractional orders. Besides showing that the fractional discrete model fits the real data of the pandemic, the simulation findings also show that the numbers of new daily cases, additional severe cases and deaths exhibit chaotic behavior without any effective attempts to curb the epidemic.
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International databases
Database:
MEDLINE
Language:
English
Journal:
Nonlinear Dyn
Year:
2022
Document Type:
Article
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