PCDiagonalScaleSet

Indicates the left scaling to use to apply an additional left and right scaling as needed by certain time-stepping codes.

Synopsis

#include "petscsles.h" 
int PCDiagonalScaleSet(PC pc,Vec s)
Collective on PC

Input Parameters

pc - the preconditioner context
s - scaling vector

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}.

Keywords

PC

See Also

PCCreate(), PCSetUp(), PCDiagonalScaleLeft(), PCDiagonalScaleRight(), PCDiagonalScale()

Level:intermediate
Location:
src/sles/pc/interface/precon.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages

Examples

src/sles/examples/tutorials/ex10.c.html