petsc-3.13.6 2020-09-29

PetscSFComputeMultiRootOriginalNumbering

Returns original numbering of multi-roots (roots of multi-SF returned by PetscSFGetMultiSF()). Each multi-root is assigned index of the corresponding original root.

Synopsis

#include "petscsf.h" 
PetscErrorCode PetscSFComputeMultiRootOriginalNumbering(PetscSF sf, const PetscInt degree[], PetscInt *nMultiRoots, PetscInt *multiRootsOrigNumbering[])

Collective

Input Arguments

	sf	- star forest
	degree	- degree of each root vertex, computed with PetscSFComputeDegreeBegin()/PetscSFComputeDegreeEnd()

Output Arguments

	nMultiRoots	- (optional) number of multi-roots (roots of multi-SF)
	multiRootsOrigNumbering	- original indices of multi-roots; length of this array is nMultiRoots

Notes

The returned array multiRootsOrigNumbering is newly allocated and should be destroyed with PetscFree() when no longer needed.

Level

developer

Location

src/vec/is/sf/interface/sf.c

Examples

src/vec/is/sf/tutorials/ex1.c.html

Index of all PetscSF routines
Table of Contents for all manual pages
Index of all manual pages