SVDCyclicSetExplicitMatrix#

Indicate if the eigensolver operator \(H(A)=\begin{bmatrix}0&A\\A^*&0\end{bmatrix}\) must be computed explicitly.

Synopsis#

#include "slepcsvd.h" 
PetscErrorCode SVDCyclicSetExplicitMatrix(SVD svd,PetscBool explicitmat)

Logically Collective

Input Parameters#

  • svd - the singular value solver context

  • explicitmat - PETSC_TRUE if \(H(A)\) must be built explicitly

Options Database Key#

  • -svd_cyclic_explicitmatrix - toggle the explicit construction of the matrix

Notes#

In GSVD and HSVD the equivalent eigenvalue problem has generalized form, and hence two matrices are built. See Mathematical Background for details.

By default the matrices are not built explicitly, but handled as shell matrices, see MATSHELL.

See Also#

SVD: Singular Value Decomposition, Mathematical Background, SVDCYCLIC, SVDCyclicGetExplicitMatrix(), MATSHELL

Level#

advanced

Location#

src/svd/impls/cyclic/cyclic.c

Implementations#

SVDCyclicSetExplicitMatrix_Cyclic() in src/svd/impls/cyclic/cyclic.c

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