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Parameters g,k,a,b;
ParameterDomain = [0,1];
Variable t,I;
ODEFunction I'=g*(k+a*I(t-1))*(1000000000-I(t-1))-b*I*I(t-1);
Data;
// t  I
0 17728141
1 78719771
2 67447741
3 47499659
4 43221082
5 31839223
6 62327456
7 50526899
8 47775440
9 49976548
10 53860116
11 42759007

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