model that describes the number of carrots x = x (t) and the number of tomatoes y = y (t) that are in a closed area can be written:
x ′ = 2x − 0.5x2 −0.9xy
y ′ = −y + 0.9 x y
We calculate without naming in this thesis.
Calculate how many carrots and how many tomatoes there are when there is equilibrium