MatLMVMApplyJ0Inv#
Applies some estimation of the initial Jacobian inverse to the given vector.
Synopsis#
#include "petscksp.h"
PetscErrorCode MatLMVMApplyJ0Inv(Mat B, Vec X, Vec Y)
Input Parameters#
B - A
MATLMVMmatrixX - vector to “multiply” with J0^{-1}
Output Parameter#
Y - resulting vector for the operation
Note#
The specific form of the application
depends on whether the user provided a scaling factor, a J0 matrix,
a J0 PC, or a J0 KSP object. If no form of the initial Jacobian is
provided, the function simply does an identity matrix application
(vector copy).
See Also#
KSP: Linear System Solvers, LMVM Matrices, MATLMVM, MatLMVMSetJ0(), MatLMVMSetJ0Scale(), MatLMVMSetJ0ScaleDiag(),
MatLMVMSetJ0PC(), MatLMVMSetJ0KSP(), MatLMVMApplyJ0Fwd()
Level#
advanced
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