Merge branch 'master' into barry/petscoptions-object

Merge branch 'master' into barry/not-single-precision

PCBDDC: multilevel fix.

The number on nonzeros per row of B_0 could be large at coarser levels.

PCBDDC: fixes for multilevel cases

MatDetectDisconnectedSubdomains should return if the matrix is empty
Switch to KSPDestroy instead of destroying the pc (this will be fixed once BDDC will have its

PCBDDC: fixes for multilevel cases

MatDetectDisconnectedSubdomains should return if the matrix is empty
Switch to KSPDestroy instead of destroying the pc (this will be fixed once BDDC will have its own reset method)

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PCBDDC: remove unneeded code for disconnected subdomains detection in PCBDDCAnalyzeInterface

corrected code for PCBDDCBenignCheck
NullSpace propogation disabled: all this nullspace thing is fragile

PCBDDC: remove unneeded code for disconnected subdomains detection in PCBDDCAnalyzeInterface

corrected code for PCBDDCBenignCheck
NullSpace propogation disabled: all this nullspace thing is fragile at the moment, need to be rethought

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Merge remote-tracking branch 'petsc/master' into moved-partitioning-to-pcgasmsetup

Merge branch 'master' into barry/all-petscoptionssetvalue-beforepetscinitialize

Merge branch 'master' into barry-allow-vecset-nan-3.6

Merge branch 'master' into barry/remove-unneed-tao-tolerances

Merge branch 'stefano_zampini/feature-pardiso-schur' of https://bitbucket.org/petsc/petsc into stefano_zampini/feature-pardiso-schur

PCBDDC: added missing check for pressure dofs

PCBDDC: remove explicit references to mumps in the source code

PCBDDC: remove matmatmult operation, and exploit knowledge of pressure change of basis

Merge remote-tracking branch 'origin/hzhang/matmatmult_dense'

PCBDDC: complete optimization of benign subspace trick

There's no longer need of PtAP operations on local matrices

Complete update to new PetscOptions interface

PCBDDC: added LDL^T factor workaround for change of basis on pressures

when changing the basis on the pressures, the local problems loose sparsity, and the nonzero entries in the LDL^T factors grow

PCBDDC: added LDL^T factor workaround for change of basis on pressures

when changing the basis on the pressures, the local problems loose sparsity, and the nonzero entries in the LDL^T factors grow like n^2 or greater

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Merge remote-tracking branch 'petsc/master' into fix-pcgasm-reuse

add MAT_INPLACE_MATRIX; replace MAT_REUSE_MATRIX with it for MatConvert()

Merge branch 'master' into knepley/fix-examples-plex

* master: (112 commits)
correct expression for implict ODE/DAE in table 11 of users manual
remove warning about deprecated MPI call in exampl

Merge branch 'master' into knepley/fix-examples-plex

* master: (112 commits)
correct expression for implict ODE/DAE in table 11 of users manual
remove warning about deprecated MPI call in examples
rm variables declared in middle of subroutine
tolerance for equality in PETSc test should depend on machine epsilon
tolerance for acccuracy in test example should depend on machine epsilon
increase convergence tolerance to get same result in single precision as double for convergence history
update no change output for gasm test which had not been properly updated
remove C++ // comment
example mistakenly used MPI_COMM_WORLD as if it was rank in print statement thus producing output only with MPI Uni
grep out name of DM object since on some systems the address printed has extra zeros thus producing a false difference in output
increase tolerance for test example
build: revert el6-4 build to cg - as el6 compilers give link errors
fix error type
insure similar convergence history for single, double, quad
fix ex104.c based on Barry's suggestion
increase example convergence tolerance to get matching convergence history in single and double precision
increase convergence tolerance so that test example has similar convergence history in single and double precisions
changed from cg to gmres for eigenestimator since in single precision cg produced a possible indefinite matrix report
change test example tolerance to depend on machine epsilon so as to give correct results in various precisions
loosen convergence tolerance to have similar convergence history with single, double, quad precisions
...

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Merge branch 'master' into shri/add-tsevent-to-powergrid-examples

Merge branch 'master' into stefano_zampini/feature-pardiso-schur

Branch got out of sync with master

Merge branch 'barry/add-mpiu_allreduce'

PCBDDC: destroy new_global_mat if not using the change of basis (reuse fix)

We always start with petsc/master. Trying to fix a bug (submatrix reuse) reported by
Dmitry.
Merge remote-tracking branch 'petsc/master' into fix-pcgasm-reuse