petsc-3.7.6 2017-04-24
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Define adjacency in the mesh using either the cone or the support first

### Synopsis

#include "petscdmplex.h"
#include "petscdmlabel.h"

### Input Parameters

 dm - The DM object useCone - Flag to use the cone first

### Notes

FEM:   Two points p and q are adjacent if q \in closure(star(p)),   useCone = PETSC_FALSE, useClosure = PETSC_TRUE
FVM:   Two points p and q are adjacent if q \in support(p+cone(p)), useCone = PETSC_TRUE,  useClosure = PETSC_FALSE
FVM++: Two points p and q are adjacent if q \in star(closure(p)),   useCone = PETSC_TRUE,  useClosure = PETSC_TRUE