Mat: added MatFactorSchurStatus to enable the user to progress factorization/inversion of the Schur complement

MatMUMPS: added support for sparse right-hand sides in sequential

fix compile warning
/sandbox/petsc/petsc.clone-3/include/../src/mat/impls/aij/mpi/mpiaij.h:192:17: warning: ‘p_oth’ may be used uninitialized in this function [-Wmaybe-uninitialized]

Merge branch 'hzhang/matmatops_mpiaij4np1'

Merge remote-tracking branch 'origin/stefano_zampini/feature-allow-mumpsparallelschur'

MatMUMPS: fix from nightlybuilds

Merge branch 'maint'

update scalable routines

update numeric ptap

add support for matmatops_mpiaij for np=1
Requested-by: Ce Qin <qince168@gmail.com>

fix typos in mumps.c
Reported-by: pierre.jolivet@enseeiht.fr

fix duplicate definitions warned by -Wredundant-decls

Also a bugfix? BLASdotu_ -> dotu

Reported-by: Till Martens <till.martens@dlr.de>

MatSetOption(mat,MAT_IGNORE_ZERO_ENTRIES,PETSC_TRUE) no longer applies to zero values set or added to the matrix diagonal, they are now not ignored and are included in the matrix nonzero structure. T

MatSetOption(mat,MAT_IGNORE_ZERO_ENTRIES,PETSC_TRUE) no longer applies to zero values set or added to the matrix diagonal, they are now not ignored and are included in the matrix nonzero structure. This is useful for Jacobians passed to TS.

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fix nightlybuild error

/usr/home/balay/petsc.clone-3/src/mat/impls/aij/mpi/mumps/mumps.c:1766:10: error: invalid conversion from 'int' to 'PetscBool' [-fpermissive]
ls = mumps->myid ? !size :

fix nightlybuild error

/usr/home/balay/petsc.clone-3/src/mat/impls/aij/mpi/mumps/mumps.c:1766:10: error: invalid conversion from 'int' to 'PetscBool' [-fpermissive]
ls = mumps->myid ? !size : PETSC_TRUE;

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MatMUMPS: allow computation of centralized Schur complement in parallel

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

rename struct Mat_SubMat -> Mat_SubSppt

rename MatGetSubMat -> MatCreateSubMat

Mark MatCreateMPIAIJWithSplitArrays() and MatMPIAIJSetPreallocationCSR() with MAT_NO_OFF_PROC_ENTRIES

This eliminates unneeded global reductions during the MatAssemblyBegin/End() process.

Thanks-to

Mark MatCreateMPIAIJWithSplitArrays() and MatMPIAIJSetPreallocationCSR() with MAT_NO_OFF_PROC_ENTRIES

This eliminates unneeded global reductions during the MatAssemblyBegin/End() process.

Thanks-to: Pierre Jolivet <Pierre.Jolivet@enseeiht.fr>

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rm unused variable

cleanup

scalable MatPtAP works now

replace PetscLLCondensedCreate() with PetscLLCondensedCreate_Scalable() for computing A*P

small cleanup

add MatPtAPSymbolic_MPIAIJ_MPIAIJ_scalable()