PCASMCreateSubdomains2D#
Creates the index sets for the overlapping Schwarz preconditioner, PCASM
, for a two-dimensional problem on a regular grid.
Synopsis#
Not Collective
Input Parameters#
m - the number of mesh points in the x direction
n - the number of mesh points in the y direction
M - the number of subdomains in the x direction
N - the number of subdomains in the y direction
dof - degrees of freedom per node
overlap - overlap in mesh lines
Output Parameters#
Nsub - the number of subdomains created
is - array of index sets defining overlapping (if overlap > 0) subdomains
is_local - array of index sets defining non-overlapping subdomains
Note#
Presently PCAMSCreateSubdomains2d()
is valid only for sequential
preconditioners. More general related routines are
PCASMSetTotalSubdomains()
and PCASMSetLocalSubdomains()
.
Fortran Notes#
is
must be declared as an array of length long enough to hold Nsub
entries
See Also#
KSP: Linear System Solvers, PCASM
, PCASMSetTotalSubdomains()
, PCASMSetLocalSubdomains()
, PCASMGetSubKSP()
,
PCASMSetOverlap()
Level#
advanced
Location#
Examples#
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages