Added new versions of DiagST as indicated in the paper 'Additive Overlapping DDM' (i.e, the source is calculated at the subdomain that receives it and it's multiplied by the indicator function of the non-overlapping partition)

examples/maxwell-solver/DST/helmholtz.cpp

@@ -231,7 +231,7 @@ int main(int argc, char *argv[])
 
 
 
-   int n= 50;
+   int n= 1;
    X = 0.0;
    Vector z(X.Size()); z = 0.0;
    Vector r(B);
@@ -326,10 +326,10 @@ double f_exact_Re(const Vector &x)
    double x2 = length/2.0;
    // x0 = 0.59;
    // x0 = 0.19;
-   x0 = 0.15;
+   x0 = 0.2;
    // x1 = 0.768;
    // x1 = 0.168;
-   x1 = 0.15;
+   x1 = 0.5;
    double alpha,beta;
    // double n = 5.0*omega/M_PI;
    double n = 4.0*omega/M_PI;
@@ -343,8 +343,8 @@ double f_exact_Re(const Vector &x)
    alpha = -pow(n,2) * beta;
    f_re = coeff*exp(alpha);
 
-   x0 = 0.7;
-   x1 = 0.7;
+   x0 = 0.85;
+   x1 = 0.85;
    beta = pow(x0-x(0),2) + pow(x1-x(1),2);
    if (dim == 3) { beta += pow(x2-x(2),2); }
    alpha = -pow(n,2) * beta;