SVDSetImplicitTranspose#

Indicates how to handle the transpose of the matrix associated with the singular value problem.

Synopsis#

#include "slepcsvd.h" 
PetscErrorCode SVDSetImplicitTranspose(SVD svd,PetscBool impl)

Logically Collective

Input Parameters#

  • svd - the singular value solver context

  • impl - how to handle the transpose (implicitly or not)

Options Database Key#

  • -svd_implicittranspose - enable the implicit transpose mode

Notes#

By default, the transpose of the matrix is explicitly built (if the matrix has defined the MatTranspose() operation, MATOP_TRANSPOSE).

If this flag is set to PETSC_TRUE, the solver does not build the transpose, but handles it implicitly via MatMultTranspose() (or MatMultHermitianTranspose() in the complex case) operations. This is likely to be more inefficient than the default behavior, both sequentially and in parallel, but requires less storage.

See Also#

SVD: Singular Value Decomposition, SVDGetImplicitTranspose(), SVDSolve(), SVDSetOperators()

Level#

advanced

Location#

src/svd/interface/svdopts.c

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