PCFieldSplitSchurFactType#
determines which off-diagonal parts of the approximate block factorization to use
Synopsis#
Values#
PC_FIELDSPLIT_SCHUR_FACT_DIAG
- the preconditioner is solvingD
PC_FIELDSPLIT_SCHUR_FACT_LOWER
- the preconditioner is solvingL D
PC_FIELDSPLIT_SCHUR_FACT_UPPER
- the preconditioner is solvingD U
PC_FIELDSPLIT_SCHUR_FACT_FULL
- the preconditioner is solvingL(D U)
where the matrix is factorized as
(A B) = (1 0) (A 0) (1 Ainv*B) = L D U
(C E) (C*Ainv 1) (0 S) (0 1)
See Also#
Preconditioners, PCFIELDSPLIT
, PCFieldSplitSetSchurFactType()
, PC
Level#
intermediate
Location#
Examples#
src/dm/impls/stag/tutorials/ex4.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages