PCBDDC: fill should be set to reuse after KSPSetFromOptions

PCBDDC: added option to aggregate the adjacency between subdomains on a subset of the active processes

non contiguos option removed from MatISGetSubassemblingPattern

PCBDDC: fix warnings from nightly cxx-complex builds

PCBDDC: minimize conversions between matrix formats

PCBDDC: Replaced old non-memory scalable implementation of PCBDDCSubsetNumbering

New implementation is memory scalable and more efficient

PCBDDC: wrong restriction on coarse processors (now fixed)

PCBDDC: fix for complex builds

PCBDDC: if not using vertices (if any are present), we cannot reuse the Schur solver

PCBDDC: previous block check is invalid when R nodes come from reuse_mumps

It can happen that R is like this
0 1 2 3 6 9 4 7 10 5 8 11
Using the previous code the latter IS would be defined as block

PCBDDC: previous block check is invalid when R nodes come from reuse_mumps

It can happen that R is like this
0 1 2 3 6 9 4 7 10 5 8 11
Using the previous code the latter IS would be defined as blocked (but it isn't)

show more ...

PCBDDC: it does not have any sense to require adaptivity just for edges.

less stringent hermitian test in sub_schurs code

Merge branch 'barry/improve-nullspace-handling'

PCBDDC: improve logic around symmetric and positive definite

removed KSPSetNullSpace() since mat already carries that information
and having two locations for it is confusing, unnecessary and prone to error
added MatSetTransposeNullSpace() for providing the nu

removed KSPSetNullSpace() since mat already carries that information
and having two locations for it is confusing, unnecessary and prone to error
added MatSetTransposeNullSpace() for providing the null space of the transpose of the matrix and added support in KSPSolve() to remove this null space from the right handside of the linear system thus making the system consistent.

show more ...

PCBDDC: print ccs if we are in 2D

PCBDDC: reuse matrices with MatGetSubMatrices

PCBDDC: add output for psi basis functions

PCBDDC: rearrange symmetry, positive-definitess stuffs

Added pc_bddc_symmetric command line options to shift to unsymmetric basis computation

PCBDDC: no need for eigensolver is S == St

PCBDDC: when n_subs == 1 and size_schur == size_active_schur reuse already inverted block

PCBDDC: fixes for compiler warnings

PCBDDC: fix for complexes

hermitian and positive definitess checks should be replaced by something which is more robust

PCBDDC: complete support for MUMPS Schur solver reusage

is_R and is_B should be created during SubSchursSetUp
Added preprocessor guards

PCBDDC: added support for transpose application of the BDDC when reusing MUMPS solver

PCBDDC: reuse Schur solver provided by MUMPS when possible

MATIS: n_sends should stay there!!!!

if n_sends is not part of the logic, we cannot overlap levels!