petsc3.13.6 20200929
MatLMVMUpdate
Adds (XXprev) and (FFprev) 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 LMVMtype 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
Table of Contents for all manual pages
Index of all manual pages