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Fitting delay differential equations (DDE)
I have the following differential equations:
$$S'(t) = 0.31 S(t) \Big( 1 - \frac{S(t)}{6.19} \Big)- \frac{a}{1 + B(t)} S(t),$$
$$B'(t) = c (1 - B(t)) - d B(t) S(t) - 3 c (1 - B(t - 18)),$$
where $B(t -...
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Fitting data with inclusion of constraints
How do I find a fit for the dataS (see below) with the constraint that the parameter np
is an integer, and that the parameters la+lc = 100. A weak attempt at this is provided below for a specific ...