public static Vector BasicMGM(MGM_in setup)
{
double h = setup.h;
// Vector g = ((h * h) / 4d) * setup.b;
Vector z = setup.z;
double W = (h * h) / 4d;
Vector d_temp;// = DifferenceEquations.multiplyD2U(z) - setup.b;
if (setup.level == 0)
{
return(setup.z); //точное решение на грубой сетке
}
else
{
//ню базовых итераций
for (int k = 0; k < setup.nu; k++)
{
d_temp = DifferentialEquation.multiplyD2U(z) - setup.b;
z = z - W * d_temp;
}
//коррекция
Vector d_2h = Proektor.basic_r(DifferentialEquation.multiplyD2U(z) - setup.b);
Vector e_2h = new Vector(d_2h.Length);
//Решакем Ае = d
for (int i = 0; i < setup.gamma; i++)
{
MGM_in set = new MGM_in(setup.level - 1, e_2h, d_2h, setup.nu, 2d * h, setup.gamma);
e_2h = BasicMGM(set);
}
//z = z - pe
z = z - Resumption.basic_p(e_2h);
//постсглаживание
for (int k = 0; k < setup.nu; k++)
{
d_temp = DifferentialEquation.multiplyD2U(z) - setup.b;
z = z - W * d_temp;
}
return(z);
}
}
public static Vector MGMFull(MGM_in setup)
{
Vector r = Vector.GetConstVector(1d, setup.N);
Vector z = new Vector();
Vector.copy(ref setup.z, setup.b);
while (r.Norm > 0.001d)
{
//MessageBox.Show("||r|| = " + r.Norm2SQ.ToString("0.0000000"));
z = BasicMGM(setup);
r = DifferentialEquation.multiplyD2U(z) - setup.b;
Vector.copy(ref setup.z, z);
}
return(z);
}
//-------------------------------------------------------------------------------------------
public static Vector BasicTwoGM(MGM_in setup)
{
double h = setup.h;
double W = ((h * h) / 4d);
Vector z = new Vector(setup.N);
Vector e_h;
Vector d_temp;
Vector Az;
do
{
for (int k = 0; k < setup.nu; k++)
{
Az = (Vector)setup.equation(z);
d_temp = Az - setup.b;
z = z - W * d_temp;
}
//проектирование ошибки
Az = (Vector)setup.equation(z);
Vector d_h = Az - setup.b;
Vector d_2h = Proektor.basic_r(d_h);
//решаем систему на грубой сетке прогонкой
Vector e_2h = (Vector)setup.solver(d_2h);
//продолжаем на исходную сетку
e_h = Resumption.basic_p(e_2h);
z = z - e_h;
/*
* for (int k = 0; k < setup.nu; k++)
* {
* z = DifferenceEquations.multiplyD2U_Jacobi(z, h) + g;
* }*/
//r = DifferenceEquations.multiplyD2U(z) - setup.b;
//MessageBox.Show(e_h.Norm2SQ.ToString("0.0000000"));
} while (e_h.Norm > setup.EPS);
return(z);
}
