public IIteration DoIteration(IIteration prevIter)
        {
            it = (HJIteration)prevIter;
            double f = ip.GetFuncValue(it.arrX);

            while (it.arrE == null)
            {
                f = ip.GetFuncValue(it.arrX);
                double[] arrENext, arrXNext;
                double   fNext = Research(it.arrX, out arrENext, out arrXNext);
                if (Math.Abs(fNext - f) < ip.fEpsilon)
                {
                    for (int i = 0; i < it.arrXDelta.Length; i++)
                    {
                        it.arrXDelta[i] /= 2;
                    }
                    for (int i = 0; i < it.arrXDelta.Length; i++)
                    {
                        if (it.arrXDelta[i] < ip.xEpsilon)
                        {
                            it.CalcResult(ip);
                            return(null);
                        }
                    }
                }
                else
                {
                    it.arrE = arrENext;
                }
            }
            double[] arrXSmp = new double[it.arrX.Length];
            for (int i = 0; i < arrXSmp.Length; i++)
            {
                arrXSmp[i] = it.arrX[i] + it.arrE[i] * it.mult;
            }
            double fSmp = ip.GetFuncValue(arrXSmp);

            if (Math.Abs(fSmp - f) < ip.fEpsilon || fSmp > f)
            {
                it.fRes = f;
                return(new HJIteration(it.arrX, it.arrXDelta, null, 1));
            }
            double[]    arrXRes, arrERes;
            double      fRes = Research(arrXSmp, out arrERes, out arrXRes);
            HJIteration itNext;

            if (Math.Abs(fRes - f) < ip.fEpsilon)
            {
                it.fRes = f;
                itNext  = new HJIteration(it.arrX, it.arrXDelta, null, 1);
            }
            else
            {
                it.fRes = fSmp;
                itNext  = new HJIteration(arrXSmp, it.arrXDelta, it.arrE, it.mult + 1);
            }
            return(itNext);
        }
 public void CalcResult(HJInitialParams ip)
 {
     fRes = ip.GetFuncValue(arrX);
 }