petsc-3.13.6 2020-09-29
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PCBDDCSetLocalAdjacencyGraph

 Set adjacency structure (CSR graph) of the local degrees of freedom.

Synopsis

#include "petscpc.h" 
PetscErrorCode PCBDDCSetLocalAdjacencyGraph(PC pc,PetscInt nvtxs,const PetscInt xadj[],const PetscInt adjncy[], PetscCopyMode copymode)
Not collective

Input Parameters

pc - the preconditioning context.
nvtxs - number of local vertices of the graph (i.e., the number of local dofs).
xadj, adjncy - the connectivity of the dofs in CSR format.
copymode - supported modes are PETSC_COPY_VALUES, PETSC_USE_POINTER or PETSC_OWN_POINTER.

Notes

A dof is considered connected with all local dofs if xadj[dof+1]-xadj[dof] == 1 and adjncy[xadj[dof]] is negative.

See Also

PCBDDC,PetscCopyMode

Level

intermediate

Location

src/ksp/pc/impls/bddc/bddc.c

Examples

src/ksp/ksp/tutorials/ex59.c.html

Implementations

PCBDDCSetLocalAdjacencyGraph_BDDC in src/ksp/pc/impls/bddc/bddc.c

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