GearsBDFWithNordsieckStateInitialize(Double, Double, ActionDouble, Double, Double, MultiStepMethodBaseCalculateJacobian) Method

public GearsBDFWithNordsieckState Initialize(
	double x0,
	double[] y0,
	Action<double, double[], double[]> f,
	MultiStepMethodBaseCalculateJacobian? jacobianEvaluation
)

Parameters

x0  Double

The initial x value.

y0  Double

The initial y values.

f  ActionDouble, Double, Double

Calculation of the derivatives. First argument is x value, 2nd argument are the current y values. The 3rd argument is an array that store the derivatives.

jacobianEvaluation  MultiStepMethodBaseCalculateJacobian

Calculation of the jacobian. If you provide a method, this method will be used to evaluate the jacobian. Else, if no method is provided (null), the behavior depends on the further options: If IterationMethod is set to UseJacobian, then the jacobian is approximated using finite differences. If IterationMethod is set to DoNotUseJacobian, then only iteration (and not Newton-Raphson) is used to evaluate y_next, which can take longer.

Return Value

Reference