public interface ExtendedFirstOrderDifferentialEquations extends FirstOrderDifferentialEquations
This interface is a simple extension on the
FirstOrderDifferentialEquations that allows to identify which part
of a complete set of differential equations correspond to the main
set and which part correspond to the extension set.
One typical use case is the computation of Jacobians. The main
set of equations correspond to the raw ode, and we add to this set
another bunch of equations which represent the jacobians of the
main set. In that case, we want the integrator to use only
the main set to estimate the errors and hence the step sizes. It should
not use the additional equations in this computation. If the
complete ode implements this interface, the
integrator will be able to know where the main set ends and where the
extended set begins.
We consider that the main set always corresponds to the first equations and the extended set to the last equations.
|Modifier and Type||Method and Description|
Return the dimension of the main set of equations.
The main set of equations represent the first part of an ODE state. The error estimations and adaptive step size computation should be done on this first part only, not on the final part of the state which represent an extension set of equations which are considered secondary.
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