petsc-3.13.6 2020-09-29

MatCoarsenRegister

Adds a new sparse matrix coarsening algorithm to the matrix package.

#include "petscmatcoarsen.h" 
PetscErrorCode  MatCoarsenRegister(const char sname[],PetscErrorCode (*function)(MatCoarsen))

Logically Collective

	sname	- name of coarsen (for example MATCOARSENMIS)
	function	- function pointer that creates the coarsen type

   MatCoarsenRegister("my_agg",MyAggCreate);

Then, your aggregator can be chosen with the procedural interface via

    MatCoarsenSetType(agg,"my_agg")

or at runtime via the option

    -mat_coarsen_type my_agg

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