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.

Note#

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

Implementations#

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

Edit on GitLab

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