MatLMVMUpdate#

Adds (X-Xprev) and (F-Fprev) updates to an MATLMVM matrix. The first time the function is called for an MATLMVM 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 MATLMVM matrix in place of J0, the J0 matrix is also updated recursively.

Input Parameters#

  • B - A MATLMVM matrix

  • X - Solution vector

  • F - Function vector

See Also#

KSP: Linear System Solvers, LMVM Matrices, MATLMVM, 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