property BackError: Double;
Holds the backward or iterative stopping criteria.
Returns: Double
Remarks:
After running direct solver (TSparseMtx.Solve method) with active iterative refinement (TSparseMtx.RefinmentIters > 0) the property holds the backward error. In case of iterative solvers (TSparseMtx.SolveIterative method), the property holds the error according to the stoping criteria (see TSparseMtx.ConvergenceCheck property).