DSSetState#

Change the state of the DS object.

Synopsis#

#include "slepcds.h" 
PetscErrorCode DSSetState(DS ds,DSStateType state)

Logically Collective

Input Parameters#

  • ds - the direct solver context

  • state - the new state

Notes#

The state indicates that the dense system is in an initial state (raw), in an intermediate state (such as tridiagonal, Hessenberg or Hessenberg-triangular), in a condensed state (such as diagonal, Schur or generalized Schur), or in a truncated state.

The state is automatically changed in functions such as DSSolve() or DSTruncate(). This function is normally used to return to the raw state when the condensed structure is destroyed, or to indicate that DSSolve() must start with a problem that already has an intermediate form.

See Also#

DS: Direct Solver (or Dense System), DSGetState(), DSSolve(), DSTruncate()

Level#

advanced

Location#

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

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