The derivative function of an example two-dimensional autonomous ODE system.
The value of t, the independent variable, to evaluate the derivative at. Should be a single number.
The values of x and y, the dependent variables, to evaluate the derivative at. Should be a vector of length two.
The values of the parameters of the system. Not required here.
example8 evaluates the derivatives of the following coupled ODE system
at the point (t, x, y):
Its format is designed to be compatible with
Returns a list containing the values of the two derivatives at (t, x, y).
Michael J. Grayling
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