#include "petscksp.h" PetscErrorCode PCDiagonalScaleLeft(PC pc,Vec in,Vec out)Logically Collective on PC
Notes: The system solved via the Krylov method is
D M A D^{-1} y = D M b for left preconditioning or
D A M D^{-1} z = D b for right preconditioning
PCDiagonalScaleLeft() scales a vector by D. PCDiagonalScaleRight() scales a vector by D^{-1}.
If diagonal scaling is turned off and in is not out then in is copied to out
Level:intermediate
Location:src/ksp/pc/interface/precon.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages
pc | - the preconditioner context | |
in | - input vector + out - scaled vector (maybe the same as in) |