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<h1> Docs: Changes: 2.1.6</h1>
<p align="center"><font color="#ff0000" size="5"><a name="CHANGES">CHANGES</a>
in PETSc 2.1.6 </font></p>
<p><font size="4"><strong><u>General:<br>
</u></strong></font></p>
<ul>
<li>Added support for Cray X1</li>
<li>Added option '-suggest' to petscarch script. It suggests
some possible PETSC_ARCHes to use</li>
<li>Installation instructions are rewritten<br>
</li>
</ul>
<ul>
</ul>
<p><u><b>Vec:</b></u><br>
</p>
<ul>
<li> VecNorm now caches NORM_2</li>
<li>Added VecStrideScale(), VecStrideGather(),
VecStrideScatter()</li>
<li>Added
VecBlockNorm(),VecBlockMax(),VecBlockMin(),VecBlockScale()<br>
</li>
</ul>
<ul>
</ul>
<p><u><b>Mat:</b></u></p>
<ul>
<li>The interface to external packages that support direct
solvers has been reorganized. This is implemented using new matrix
types MATSEQAIJSPOOLES, MATMPIAIJSPOOLES, MATSEQSBAIJSPOOLES,
MATMPISBAIJSPOOLES, MATSUPERLU, MATSUPERLU_DIST, MATUMFPACK,MATESSL,
MATLUSOL, MATAIJMUMPS, MATSBAIJMUMPS, MATDSCPACK<br>
</li>
<li>Added new convenience matrix types which automatically
switch between Seq and MPI implementations depending on the size of the
communicator used during creation: MATAIJ, MATBAIJ, MATSBAIJ, MATMAIJ,
MATDENSE, MATBDIAG</li>
<li>Changed default matrix-free compute h to use WP since it
uses fewer reductions</li>
<li>Replace the datatypes MatLUInfo and MatILUInfo by
MatFactorInfo</li>
<li>Added cholesky support to SeqAIJ</li>
<li>Added support for SUBSET_NONZERO_PATTERN with MatAXPY for
AIJ & BAIJ<br>
</li>
<li>Added MatIsSymmetric() for AIJ</li>
<li>Added LDA support in SeqDense</li>
<li>The ncols argument made optional in MatGetRow()</li>
<li>Added MAT_KEEP_ZEROED_ROWS for MPIROWBS</li>
<li>Removed -aij_oneindex support from AIJ code</li>
<li>Added MatPartitioningSetPartitionWeights() - useable with
ParMetis</li>
<li>MatGetSubMatrices() now works for ROWBS<br>
</li>
</ul>
<p><u><b>PC:<br>
</b></u></p>
<ul>
<li>Added PCICCSetDamping() or -pc_icc_damping</li>
<li>Added -pc_constant_null_space</li>
<li>Added PCILUSetShift() or -pc_ilu_shift to support damping
using the identity</li>
<li>Added PCLUSetShift() or -pc_lu_shift to support
damping using the identity</li>
<li>Added PCICCSetShift() or -pc_icc_shift to support damping
using the identity<br>
</li>
</ul>
<ul>
</ul>
<p><u><b>KSP:</b></u></p>
<ul>
<li>Added a new ksp_type LGMRES</li>
<li>Added KSPSetComputeSingularValues() support to ksp_type
FGMRES<br>
</li>
</ul>
<p> <u><b>TS:<br>
</b></u></p>
<ul>
<li>Added support for Runge-Kutta using ts_type TS_RUNGE_KUTTA<br>
</li>
</ul>
<ul>
</ul>
<p><span style="font-weight: bold; text-decoration: underline;">DMMG:</span><br>
</p>
<ul>
<li>-dmmg_jacobian_period -1 => jacobian is frozen after
initial construction<br>
</li>
</ul>
<p><span style="font-weight: bold; text-decoration: underline;">DA:</span></p>
<ul>
<li>Allow user preallocation of jacobian using DASetGetMatrix()<br>
</li>
<li>DAGetMatrix now correctly returns the requested type. </li>
<li>-mat_type typename overloads the requested type for
DAGetMatrix </li>
</ul>
<p><span style="font-weight: bold; text-decoration: underline;">SYS:</span></p>
<ul>
<li>Added new viewer_type PETSC_VIEWER_NETCDF, PETSC_VIEWER_HDF4</li>
<li>PETSc error handlers now trap many more signals.<br>
</li>
</ul>
<p><span style="font-weight: bold; text-decoration: underline;">Fortran:</span><br>
</p>
<ul>
<li>PetscPushErrorHandler() and PetscPopErrorHandler() now
supported</li>
<li>PetscPrintf() and PetscSynchronizedPrintf() now work in
fortran with a single string</li>
</ul>
<p><br>
<span style="font-weight: bold; text-decoration: underline;">External
Packages:</span><br>
</p>
<ul>
<li>Added TSPVodeGetParameters()</li>
<li>Parmetis-3 support added using MatPartitionSetNParts(),
ISPartitionCount()</li>
<li>MUMPS support added, including complex (using
mat_type MATAIJMUMPS, MATSBAIJMUMPS)</li>
<li>Updated SuperLU_DIST interface to SuperLU_DIST_2.0</li>
<li>Added Spooles complex support</li>
<li>Added Spooles cholesky for SeqAIJ</li>
<li>ADIC: ad_GRAD_MAX is now set in the application and
compiled into code when compiling appplication</li>
<li>The following variable names - in the buildsystem are
changed - that correspond with SuperLU_DIST<br>
SUPERLUDIST_INCLUDE -> SUPERLU_DIST_INCLUDE<br>
SUPERLUDIST_LIB -> SUPERLU_DIST_LIB<br>
PETSCHAVE_SUPERLU -> PETSC_HAVE_SUPERLU<br>
</li>
</ul>
<ul>
</ul>
<ul>
</ul>
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</tr>
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