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| Sam, I´m not sure if this system has a kind of delay, despite the error message from Mathematica. Actually, when we think about a system with delay, all equations have the same time scale for the derivatives. In others words, the left side of... |
| Hi, Natchaya, For instance: Clear[t]; a = 0.00002963808691235760; q = 0.00000906440236518953; b = 0.5; ts = 120; system = {S'[t] == (-a*S[t]*Z[t])*(1 + q*Z[t]) + ((b)*Z[t]), Z'[t] == (a*S[t]*Z[t])*(1 +... |