void
MultiVectorMatrix::AddRightMultMatrix(Number a,
const MultiVectorMatrix& U,
const Matrix& C,
Number b)
{
DBG_ASSERT(NRows()==U.NRows());
DBG_ASSERT(U.NCols()==C.NRows());
DBG_ASSERT(NCols()==C.NCols());
if (b==0.) {
FillWithNewVectors();
}
// ToDo: For now, we simply use MatrixVector multiplications, but
// we might be more efficient (at least in the non-parallel case)
// if we used Level 3 Blas
SmartPtr<const DenseVectorSpace> mydspace = new DenseVectorSpace(C.NRows());
SmartPtr<DenseVector> mydvec = mydspace->MakeNewDenseVector();
const DenseGenMatrix* dgm_C = static_cast<const DenseGenMatrix*>(&C);
DBG_ASSERT(dynamic_cast<const DenseGenMatrix*>(&C));
for (Index i=0; i<NCols(); i++) {
const Number* CValues = dgm_C->Values();
Number* myvalues = mydvec->Values();
for (Index j=0; j<U.NCols(); j++) {
myvalues[j] = CValues[i*C.NRows() + j];
}
U.MultVector(a, *mydvec, b, *Vec(i));
}
ObjectChanged();
}
ESymSolverStatus LowRankAugSystemSolver::Solve(
const SymMatrix* W,
double W_factor,
const Vector* D_x,
double delta_x,
const Vector* D_s,
double delta_s,
const Matrix* J_c,
const Vector* D_c,
double delta_c,
const Matrix* J_d,
const Vector* D_d,
double delta_d,
const Vector& rhs_x,
const Vector& rhs_s,
const Vector& rhs_c,
const Vector& rhs_d,
Vector& sol_x,
Vector& sol_s,
Vector& sol_c,
Vector& sol_d,
bool check_NegEVals,
Index numberOfNegEVals
)
{
DBG_START_METH("LowRankAugSystemSolver::Solve", dbg_verbosity);
ESymSolverStatus retval;
if( first_call_ )
{
DBG_ASSERT(IsNull(Wdiag_));
// Set up the diagonal matrix Wdiag_
Index dimx = rhs_x.Dim();
SmartPtr<DiagMatrixSpace> Wdiag_space = new DiagMatrixSpace(dimx);
Wdiag_ = Wdiag_space->MakeNewDiagMatrix();
}
// This might be used with a linear solver that cannot detect the
// inertia. In that case, we should not asked for checking the
// number of negative eigenvalues.
if( !aug_system_solver_->ProvidesInertia() )
{
check_NegEVals = false;
}
if( first_call_
|| AugmentedSystemRequiresChange(W, W_factor, D_x, delta_x, D_s, delta_s, *J_c, D_c, delta_c, *J_d, D_d,
delta_d) )
{
retval = UpdateFactorization(W, W_factor, D_x, delta_x, D_s, delta_s, *J_c, D_c, delta_c, *J_d, D_d, delta_d,
rhs_x, rhs_s, rhs_c, rhs_d, check_NegEVals, numberOfNegEVals);
if( retval != SYMSOLVER_SUCCESS )
{
return retval;
}
// Store the tags
w_tag_ = W->GetTag();
w_factor_ = W_factor;
if( D_x )
{
d_x_tag_ = D_x->GetTag();
}
else
{
d_x_tag_ = 0;
}
delta_x_ = delta_x;
if( D_s )
{
d_s_tag_ = D_s->GetTag();
}
else
{
d_s_tag_ = 0;
}
delta_s_ = delta_s;
if( J_c )
{
j_c_tag_ = J_c->GetTag();
}
else
{
j_c_tag_ = 0;
}
if( D_c )
{
d_c_tag_ = D_c->GetTag();
}
else
{
d_c_tag_ = 0;
}
delta_c_ = delta_c;
if( J_d )
{
j_d_tag_ = J_d->GetTag();
}
else
{
j_d_tag_ = 0;
}
if( D_d )
{
d_d_tag_ = D_d->GetTag();
}
else
{
d_d_tag_ = 0;
}
delta_d_ = delta_d;
first_call_ = false;
}
// Now solve the system for the given right hand side, using the
// Sherman-Morrison formula with factorization information already
// computed.
retval = aug_system_solver_->Solve(GetRawPtr(Wdiag_), W_factor, D_x, delta_x, D_s, delta_s, J_c, D_c, delta_c, J_d,
D_d, delta_d, rhs_x, rhs_s, rhs_c, rhs_d, sol_x, sol_s, sol_c, sol_d, check_NegEVals, numberOfNegEVals);
if( aug_system_solver_->ProvidesInertia() )
{
num_neg_evals_ = aug_system_solver_->NumberOfNegEVals();
}
if( retval != SYMSOLVER_SUCCESS )
{
Jnlst().Printf(J_DETAILED, J_SOLVE_PD_SYSTEM,
"LowRankAugSystemSolver: AugSystemSolver returned retval = %d for right hand side.\n", retval);
return retval;
}
if( IsValid(Vtilde1_) || IsValid(Utilde2_) )
{
// Create a CompoundVectors to store the right hand side and
// solutions
SmartPtr<CompoundVector> crhs = compound_sol_vecspace_->MakeNewCompoundVector(false);
crhs->SetComp(0, rhs_x);
crhs->SetComp(1, rhs_s);
crhs->SetComp(2, rhs_c);
crhs->SetComp(3, rhs_d);
SmartPtr<CompoundVector> csol = compound_sol_vecspace_->MakeNewCompoundVector(false);
csol->SetCompNonConst(0, sol_x);
csol->SetCompNonConst(1, sol_s);
csol->SetCompNonConst(2, sol_c);
csol->SetCompNonConst(3, sol_d);
if( IsValid(Utilde2_) )
{
Index nU = Utilde2_->NCols();
SmartPtr<DenseVectorSpace> bUspace = new DenseVectorSpace(nU);
SmartPtr<DenseVector> bU = bUspace->MakeNewDenseVector();
Utilde2_->TransMultVector(1., *crhs, 0., *bU);
J2_->CholeskySolveVector(*bU);
Utilde2_->MultVector(1., *bU, 1., *csol);
}
if( IsValid(Vtilde1_) )
{
Index nV = Vtilde1_->NCols();
SmartPtr<DenseVectorSpace> bVspace = new DenseVectorSpace(nV);
SmartPtr<DenseVector> bV = bVspace->MakeNewDenseVector();
Vtilde1_->TransMultVector(1., *crhs, 0., *bV);
J1_->CholeskySolveVector(*bV);
Vtilde1_->MultVector(-1., *bV, 1., *csol);
}
}
return retval;
}
