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I need to draw the Poincarè map of a dynamical system with $ d=2$ degrees of freedom, so I have $ 4$ dynamical variables. Two of them, $ n_2$ and $ n_3$ are “actions” while the others, $ \varphi_2$ and $ \varphi_3$ are “angles”, so they are defined $ \mathrm {mod}(2\pi)$ . The four equationsRead more

I have a dynamical system that consists of three non-linear differential equations (dP/dt, dT/t, dN/dt). This system models a biological system. The system is so complicated that I have to use a numerical solver to find solutions en plot the bifurcation diagram. My problem is the following: I have written a code in Matlab toRead more