petsc-3.7.5 2017-01-01

DMRestrict

restricts user-defined problem data to a coarser DM by running hooks registered by DMCoarsenHookAdd()

#include "petscdm.h"          
#include "petscdmlabel.h"     
PetscErrorCode DMRestrict(DM fine,Mat restrct,Vec rscale,Mat inject,DM coarse)

Collective if any hooks are

	fine	- finer DM to use as a base
	restrct	- restriction matrix, apply using MatRestrict()
	inject	- injection matrix, also use MatRestrict()
	coarse	- coarer DM to update