A convergent power series solution is obtained for the SIR model, using an
asymptotically motivated gauge function. For certain choices of model parameter
values, the series converges over the full physical domain (c'est-à-dire, for all
positive time). Furthermore, the radius of convergence as a function of
nondimensionalized initial susceptible and infected populations is obtained via
a numerical root test.

Cet article explore les excursions dans le temps et leurs implications.

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