#include "petscmat.h" PetscErrorCode MatSubMatrixVirtualUpdate(Mat N,Mat A,IS isrow,IS iscol)Collective on Mat
| N | - submatrix to update | |
| A | - full matrix in the submatrix | |
| isrow | - rows in the update (same as the first time the submatrix was created) | |
| iscol | - columns in the update (same as the first time the submatrix was created) |