set projection nullsp

set coarse problem mat

get additional PC

remove deflation type

additional PC

add SetLvl

set deflation space

init commit

Merge branch 'maint'

Remove use of _ and __ in front of PETSc include guards. Reason: C99 Reserved Identifiers

Commit-type: portability-fix

Merged in Fande-Kong/feature_hmg (pull request #1682)

Hybrid of PETSc preconditioners (such as ASM, BJacobi, SOR, etc.) and Hypre BoomerAMG

Approved-by: BarryFSmith <bsmith@mcs.anl.gov>

Improve interfaces and make HMG more general

Now HMG can take any PC as an inner PC as long as the PC
provides PCGetInterpolations and PCGetCoarseOperators

If hypre is available, it will be used b

Improve interfaces and make HMG more general

Now HMG can take any PC as an inner PC as long as the PC
provides PCGetInterpolations and PCGetCoarseOperators

If hypre is available, it will be used by default, otherwise use GAMG.
Users can override the setting using -hmg_inner_pc_type

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Move declarations to header since fortran rountine needs these

Update interfance and support GAMG

Implemented an AMG that uses Hypre to coarsen matrix

and generate a sequence of coarse matrices. These coarse
matrices are used to setup a PETSc PCMG.

There are two benefits:

(1) We can use any PE

Implemented an AMG that uses Hypre to coarsen matrix

and generate a sequence of coarse matrices. These coarse
matrices are used to setup a PETSc PCMG.

There are two benefits:

(1) We can use any PETSc preconditioners such as ASM, BJacobi as
level smoothers (solvers). For some applicaitons, the combination
of ASM and AMG works great while only AMG or AMS does not work at all.

(2) For multicomponent problems, we could just coarsen one submatrix
associated with one particular component. In this way, the setup of the
preconditioner is significantly improved. One typical use case is
neutron transport equations. There are many variables on each mesh
vertex due to the discretization of angle and energy. Each variable,
in fact, corresponds to the same PDEs but with different material
properties.

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Merge branch 'master' of bitbucket.org:petsc/petsc

Merged in barry/update-deprecate-functions (pull request #1654)

Change PETSC_DEPRECATED to PETSC_DEPRECATED_FUNCTION and PETSC_DEPRECATED_TYPEDEF for code clarity

Change PETSC_DEPRECATED to PETSC_DEPRECATED_FUNCTION and PETSC_DEPRECATED_TYPEDEF for code clarity

and to make the macros match the ones for ENUM and MACRO. Add version information for almost all de

Change PETSC_DEPRECATED to PETSC_DEPRECATED_FUNCTION and PETSC_DEPRECATED_TYPEDEF for code clarity

and to make the macros match the ones for ENUM and MACRO. Add version information for almost all deprecations
in a single consistent format. Remove a couple of unneeded deprecated functions that could be inlined.

Commit-type: style-fix

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Merged in stefano_zampini/fix-matcomputeexplicitop (pull request #1570)

Allow specifying an operator type when computing operators explicitly

Approved-by: BarryFSmith <bsmith@mcs.anl.gov>
Approved-

Merged in stefano_zampini/fix-matcomputeexplicitop (pull request #1570)

Allow specifying an operator type when computing operators explicitly

Approved-by: BarryFSmith <bsmith@mcs.anl.gov>
Approved-by: Patrick Sanan <patrick.sanan@gmail.com>

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Deprecate old {Mat|PC|KSP}ComputeExplicitOperator in favor of {Mat|PC|KSP}ComputeOperator

{Mat|PC|KSP}ComputeExplicitOperator: add extra argument for matrix type

Merged in jolivet/feature-getisbyindex (pull request #1544)

New function PCFieldSplitGetISByIndex

Approved-by: Matthew Knepley <knepley@gmail.com>
Approved-by: BarryFSmith <bsmith@mcs.anl.gov>

Add new function PCFieldSplitGetISByIndex()

Merge branch 'master' of bitbucket.org:petsc/petsc

Merge branch 'pr1417/wence/feature-patch-all-at-once/master' [PR #1417]

* pr1417/wence/feature-patch-all-at-once/master:
Some new features in PCPatch: interior face terms, and an option for "all at

Merge branch 'pr1417/wence/feature-patch-all-at-once/master' [PR #1417]

* pr1417/wence/feature-patch-all-at-once/master:
Some new features in PCPatch: interior face terms, and an option for "all at once" assembly.

This adds two new features to PCPatch:

You can now also set callbacks for interior face terms. We need these for problems with IP discretisations.
(Optionally, defaulting to false) do an “all at once” computation of all the element tensors. In our benchmarking this is quite a bit faster (problem dependent).

We have, once again, not hooked up the new callbacks with Plex (there is a TODO + SETERRQ in this case): hopefully it does not require much.
As a result, tests are in Firedrake again: https://github.com/firedrakeproject/firedrake/pull/1383

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