petsc-3.12.5 2020-03-29
MatLMVMUpdate
Adds (X-Xprev) and (F-Fprev) updates to an LMVM matrix. The first time the function is called for an LMVM matrix, no update is applied, but the given X and F vectors are stored for use as Xprev and Fprev in the next update.
Synopsis
#include "petscksp.h"
PetscErrorCode MatLMVMUpdate(Mat B, Vec X, Vec F)
If the user has provided another LMVM matrix in place of J0, the J0
matrix is also updated recursively.
Input Parameters
| B | - An LMVM-type matrix
|
| X | - Solution vector
|
| F | - Function vector
|
See Also
MatLMVMReset(), MatLMVMAllocate()
Level
intermediate
Location
src/ksp/ksp/utils/lmvm/lmvmutils.c
Index of all KSP routines
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Index of all manual pages