PCBDDCSetDivergenceMat#
Sets the linear operator representing \int_\Omega \div {\bf u} \cdot p dx for the PCBDDC preconditioner
Synopsis#
#include "petscpc.h"
PetscErrorCode PCBDDCSetDivergenceMat(PC pc, Mat divudotp, PetscBool trans, IS vl2l)
Collective
Input Parameters#
pc - the preconditioning context
divudotp - the matrix (must be of type
MATIS)trans - if
PETSC_FALSE(resp.PETSC_TRUE), then pressures are in the test (trial) space and velocities are in the trial (test) space.vl2l - optional index set describing the local (wrt the local matrix in
divudotp) to local (wrt the local matrix in the matrix used to construct the preconditioner) map for the velocities
Notes#
This auxiliary matrix is used to compute quadrature weights representing the net-flux across subdomain boundaries
If vl2l is NULL, the local ordering for velocities in divudotp should match that of the matrix used to construct the preconditioner
See Also#
KSP: Linear System Solvers, PCBDDC, PCBDDCSetDiscreteGradient()
Level#
advanced
Location#
Examples#
Implementations#
PCBDDCSetDivergenceMat_BDDC() in src/ksp/pc/impls/bddc/bddc.c
Index of all PC routines
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Index of all manual pages