/* The functions SchurSolve do IFT step, if S_==NULL, and DenseGenSchurDriver otherwise. */
bool DenseGenSchurDriver::SchurSolve(SmartPtr<IteratesVector> lhs, // new left hand side will be stored here
SmartPtr<const IteratesVector> rhs, // rhs r_s
SmartPtr<Vector> delta_u, // should be (u_p - u_0) WATCH OUT FOR THE SIGN! I like it this way, so that u_0+delta_u = u_p, but victor always used it the other way round, so be careful. At the end, delta_nu is saved in here.
SmartPtr<IteratesVector> sol) // the vector K^(-1)*r_s which usually should have been computed before.
{
DBG_START_METH("DenseGenSchurDriver::SchurSolve", dbg_verbosity);
DBG_ASSERT(IsValid(S_));
bool retval;
// set up rhs of equation (3.48a)
SmartPtr<Vector> delta_rhs = delta_u->MakeNew();
data_B()->Multiply(*sol, *delta_rhs);
delta_rhs->Print(Jnlst(),J_VECTOR,J_USER1,"delta_rhs");
delta_rhs->Scal(-1.0);
delta_rhs->Axpy(1.0, *delta_u);
delta_rhs->Print(Jnlst(),J_VECTOR,J_USER1,"rhs 3.48a");
// solve equation (3.48a) for delta_nu
SmartPtr<DenseVector> delta_nu = dynamic_cast<DenseVector*>(GetRawPtr(delta_rhs))->MakeNewDenseVector();
delta_nu->Copy(*delta_rhs);
S_->LUSolveVector(*delta_nu); // why is LUSolveVector not bool??
delta_nu->Print(Jnlst(),J_VECTOR,J_USER1,"delta_nu");
// solve equation (3.48b) for lhs (=delta_s)
SmartPtr<IteratesVector> new_rhs = lhs->MakeNewIteratesVector();
data_A()->TransMultiply(*delta_nu, *new_rhs);
new_rhs->Axpy(-1.0, *rhs);
new_rhs->Scal(-1.0);
new_rhs->Print(Jnlst(),J_VECTOR,J_USER1,"new_rhs");
retval = backsolver_->Solve(lhs, ConstPtr(new_rhs));
return retval;
}
void main(void) {
data_B();
data_A();
//P0 = 0x11;
while(1);
}
bool DenseGenSchurDriver::SchurBuild()
{
DBG_START_METH("DenseGenSchurDriver::SchurBuild", dbg_verbosity);
/* This function is the very same as the one in DenseGenSchurDriver */
bool retval = true;
Index dim_S = 0;
if (IsValid(data_B())) {
dim_S = data_B()->GetNRowsAdded();
}
if (dim_S>0) {
S_ = NULL;
SmartPtr<DenseGenMatrixSpace> S_space = new DenseGenMatrixSpace(dim_S, dim_S);
S_ = new DenseGenMatrix(GetRawPtr(S_space));
SmartPtr<Matrix> S2 = GetRawPtr(S_);
//retval = pcalc_nonconst()->GetSchurMatrix(GetRawPtr(data_B()), dynamic_cast<Matrix*>(GetRawPtr(S_)));
retval = pcalc_nonconst()->GetSchurMatrix(data_B(), S2);
S_->Print(Jnlst(),J_VECTOR,J_USER1,"S_");
}
return retval;
}
