Asymptotic forms of positive solutions of quasilinear ordinary differential equations with singular nonlinearities

2008 ◽  
Vol 68 (6) ◽  
pp. 1627-1639
Author(s):  
Ken-ichi Kamo ◽  
Hiroyuki Usami
Keyword(s):  
Differential Equations ◽  
Ordinary Differential Equations ◽  
Positive Solutions ◽  
Singular Nonlinearities ◽  
Asymptotic Forms

scholarly journals An SEIR model with infected immigrants and recovered emigrants

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Peter J. Witbooi
Keyword(s):  
Differential Equations ◽  
Ordinary Differential Equations ◽  
Positive Solutions ◽  
Equilibrium Points ◽  
Local Population ◽  
Asymptotically Stable ◽  
Short Stay ◽  
Seir Model ◽  
Threshold Levels

AbstractWe present a deterministic SEIR model of the said form. The population in point can be considered as consisting of a local population together with a migrant subpopulation. The migrants come into the local population for a short stay. In particular, the model allows for a constant inflow of individuals into different classes and constant outflow of individuals from the R-class. The system of ordinary differential equations has positive solutions and the infected classes remain above specified threshold levels. The equilibrium points are shown to be asymptotically stable. The utility of the model is demonstrated by way of an application to measles.

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