DSSetExtraRow#

Sets a flag to indicate that the matrix has one extra row.

Synopsis#

#include "slepcds.h" 
PetscErrorCode DSSetExtraRow(DS ds,PetscBool ext)

Logically Collective

Input Parameters#

  • ds - the direct solver context

  • ext - a boolean flag

Notes#

In Krylov methods it is useful that the matrix representing the direct solver has one extra row, i.e., has dimension \((n+1) \times n\). If this flag is activated, all transformations applied to the right of the matrix also affect this additional row. In that case, \((n+1)\) must be less or equal than the leading dimension.

The default is PETSC_FALSE.

See Also#

DS: Direct Solver (or Dense System), DSSolve(), DSAllocate(), DSGetExtraRow()

Level#

advanced

Location#

src/sys/classes/ds/interface/dsbasic.c

Index of all DS routines Table of Contents for all manual pages Index of all manual pages