KSPGUESSPOD#
Implements a proper orthogonal decomposition based Galerkin scheme for repeated linear system solves.
Options Database Keys#
-ksp_guess_pod_size
- Number of snapshots-ksp_guess_pod_monitor
- Monitor initial guess generator-ksp_guess_pod_tol
- Tolerance to retain eigenvectors-ksp_guess_pod_Ainner
- Use the operator as inner product (must be SPD)
Notes#
The initial guess is obtained by solving a small and dense linear system, obtained by Galerkin projection on a lower dimensional space generated by the previous solutions.
References#
**** -*** http://www.math.uni-konstanz.de/numerik/personen/volkwein/teaching/POD-Book.pdf
See Also#
KSP: Linear System Solvers, KSPGuess
, KSPGuessType
, KSPGuessCreate()
, KSPSetGuess()
, KSPGetGuess()
Level#
intermediate
Location#
src/ksp/ksp/guess/impls/pod/pod.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages