On the uniqueness of the positive solution of an integral equation which appears in epidemiological models
- 23 March 2000
- journal article
- research article
- Published by Springer Nature in Journal of Mathematical Biology
- Vol. 40 (3) , 199-228
- https://doi.org/10.1007/s002850050178
Abstract
In this paper, we show that the positive solution of a non-linear integral equation which appears in classical SIR epidemiological models is unique. The demonstration of this fact is necessary to justify the correctness of any approximate or numerical solution. The SIR epidemiological model is used only for simplicity. In fact, the methods used can be easily extended to prove the existence and uniqueness of the more involved integral equations that appear when more biological realities are considered. Thus the inclusion of a latent class (SLIR models) and models incorporating variability in the infectiousness with duration of the infection and spatial distribution lead to integral equations to which the results derived in this paper apply immediately.Keywords
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