MatLMVMSetJ0PC

Allows the user to define a PC object that acts as the initial inverse-Jacobian matrix.

Synopsis

#include "petscksp.h" 
PetscErrorCode MatLMVMSetJ0PC(Mat B, PC J0pc)

Input Parameters

• B - A MATLMVM matrix

• J0pc - PC object where PCApply() defines an inverse application for J0

Notes

J0pc should already contain all the operators necessary for its application. The MATLMVM matrix only calls PCApply() without changing any other options.

If the sizes of B have not been specified (using MatSetSizes() or MatSetLayouts()) before MatLMVMSetJ0PC() is called, then B will adopt the sizes and layouts of the operators of J0pc, and these sizes will be final.

See Also

KSP: Linear System Solvers, LMVM Matrices, MATLMVM, MatLMVMGetJ0PC()

Level

advanced

Location

src/ksp/ksp/utils/lmvm/lmvmutils.c

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