PETSc version 3.17.5

PCGAMGFilterGraph

filter (remove zero and possibly small values from the) graph and make it symmetric if requested

#include "petscpc.h" 
PetscErrorCode PCGAMGFilterGraph(Mat *a_Gmat,PetscReal vfilter,PetscBool symm)

Collective on Mat

This is called before graph coarsers are called.

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