EPSGDSetRestart#

Sets the number of vectors of the searching space after restarting and the number of vectors saved from the previous iteration.

Synopsis#

#include "slepceps.h" 
PetscErrorCode EPSGDSetRestart(EPS eps,PetscInt minv,PetscInt plusk)

Logically Collective

Input Parameters#

  • eps - the linear eigensolver context

  • minv - number of vectors of the searching subspace after restarting

  • plusk - number of vectors saved from the previous iteration

Options Database Keys#

  • -eps_gd_minv <minv> - number of vectors of the searching subspace after restarting

  • -eps_gd_plusk <plusk> - number of vectors saved from the previous iteration

Notes#

PETSC_CURRENT can be used to preserve the current value of any of the arguments, and PETSC_DETERMINE to set them to a default value.

Detailed information can be found at [Romero and Roman, 2014].

References#

[Rom14]

E. Romero and J. E. Roman. A parallel implementation of Davidson methods for large-scale eigenvalue problems in SLEPc. ACM Trans. Math. Software, 40(2):13:1–13:29, 2014. doi:10.1145/2543696.

See Also#

EPS: Eigenvalue Problem Solver, EPSGD, EPSGDGetRestart()

Level#

advanced

Location#

src/eps/impls/davidson/gd/gd.c

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