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

Evaluates the first derivative dy/dx. The first argument is the x value, the second argument is the current y vector, and the third argument is the destination array to store the derivatives.

jacobianEvaluation  MultiStepMethodBaseCalculateJacobian

Evaluates the Jacobian. If provided, it is used to evaluate the Jacobian. If , the behavior depends on the further options: if IterationMethod is set to UseJacobian, then the Jacobian is approximated using finite differences; if it is set to DoNotUseJacobian, then only iteration (and not Newton-Raphson) is used to evaluate y_next, which can take longer.

Return Value

Reference