DSSolve#

Solve the problem.

Synopsis#

#include "slepcds.h" 
PetscErrorCode DSSolve(DS ds,PetscScalar eigr[],PetscScalar eigi[])

Logically Collective

Input Parameters#

  • ds - the direct solver context

  • eigr - array to store the computed eigenvalues (real part)

  • eigi - array to store the computed eigenvalues (imaginary part)

Notes#

This call brings the dense system to condensed form. No ordering of the eigenvalues is enforced (for this, call DSSort() afterwards).

In some DS types, the arguments will hold singular values, instead of eigenvalues. Singular values are always real.

See Also#

DS: Direct Solver (or Dense System), DSSort(), DSStateType

Level#

intermediate

Location#

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

Implementations#

DSSolve_GHEP() in src/sys/classes/ds/impls/ghep/dsghep.c
DSSolve_GNHEP() in src/sys/classes/ds/impls/gnhep/dsgnhep.c
DSSolve_GSVD() in src/sys/classes/ds/impls/gsvd/dsgsvd.c
DSSolve_NHEP() in src/sys/classes/ds/impls/nhep/dsnhep.c
DSSolve_NHEPTS() in src/sys/classes/ds/impls/nhepts/dsnhepts.c

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