petsc-3.10.2 2018-10-09
Report Typos and Errors

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
Table of Contents for all manual pages
Index of all manual pages