MatLMVMSetJ0#
Allows the user to define the initial Jacobian matrix from which the LMVM-type approximation is built up.
Synopsis#
#include "petscksp.h"
PetscErrorCode MatLMVMSetJ0(Mat B, Mat J0)
Input Parameters#
B - An LMVM-type matrix
J0 - The initial Jacobian matrix, will be referenced by B.
Notes#
A KSP is created for inverting J0 with prefix -mat_lmvm_J0_ and J0 is set to both operators in KSPSetOperators().
If you want to use a separate preconditioning matrix, use MatLMVMSetJ0KSP() directly.
If the sizes of B have not been specified (using MatSetSizes() or MatSetLayouts()) before MatLMVMSetJ0() is
called, then B will adopt the sizes and layouts of J0, and these sizes will be final.
See Also#
KSP: Linear System Solvers, LMVM Matrices, MATLMVM, MatLMVMSetJ0PC(), MatLMVMSetJ0KSP()
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