NaphtaliSandholmMethodSolveNewtonCustom Method

Custom Newton solver with block-tridiagonal linear solve, backtracking line search, stagnation detection, variable clipping, and best-solution tracking.

private double[] SolveNewtonCustom(
	double[] xvar,
	int maxits,
	double tol,
	StringBuilder reporter
)

Private Function SolveNewtonCustom ( 
	xvar As Double(),
	maxits As Integer,
	tol As Double,
	reporter As StringBuilder
) As Double()