PetscSFCreateEmbeddedRootSF

removes edges from all but the selected roots of a PetscSF, does not remap indices

Synopsis

#include "petscsf.h" 
PetscErrorCode PetscSFCreateEmbeddedRootSF(PetscSF sf, PetscInt nselected, const PetscInt *selected, PetscSF *esf)

Collective

Input Parameters

• sf - original star forest

• nselected - number of selected roots on this process

• selected - indices of the selected roots on this process

Output Parameter

• esf - new star forest

Note

To use the new PetscSF, it may be necessary to know the indices of the leaves that are still participating. This can be done by calling PetscSFGetGraph().

See Also

PetscSF, PetscSFSetGraph(), PetscSFGetGraph()

Level

advanced

Location

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

Examples

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

Implementations

PetscSFCreateEmbeddedRootSF_Alltoall() in src/vec/is/sf/impls/basic/alltoall/sfalltoall.c
PetscSFCreateEmbeddedRootSF_Basic() in src/vec/is/sf/impls/basic/sfbasic.c

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