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<h1> Docs: Changes: 2.2.0</h1>
<p align="center"><font color="#ff0000" size="5"><a name="CHANGES">CHANGES</a>
in PETSc 2.2.0 </font></p>
<p><font size="4"><strong><u>General:<br>
</u></strong></font></p>
<ul> <li>Changed petscengine.h to petscmatlab.h
<li>Changed PetscOptionsEList() to return the index of the string selected by the user
(error if user enters impossible string)</ul>
<p><u><b>Vec:</b></u><br>
</p>
<ul>
</ul>
<p><u><b>Mat:</b></u></p>
<ul> <li> If you use MAT_SYMMETRIC as option for MatSetOption() you will likely
need to also use the option MAT_SYMMETRY_ETERNAL otherwise at the next MatAssembly
the matrix will likly lose the symmetry flag.
<li> Added MatISGetLocalMat() to allow preallocating the local matrix.</ul>
<p><u><b>PC:<br>
</b></u></p>
<p><u><b>KSP:</b></u></p>
<ul><li>changed unmodifiedGramSchmidt name to classicalGramSchmidt everywhere.
<li>Eliminated KSPGMRESIROrthogonalize() now have KSPGMRESSetCGSRefinement() to decide
when to use iterative refinement
<li>The SLES object has been removed from PETSc. All of this options are available via
the KSP object. For example, -sles_view_binary ->ksp_view_binary, SLESCreate()->KSPCreate()
The calling sequences SLESSetUp(sles,b,x) should be replaced with KSPSetRhs(ksp,b)
KSPSetSolution(ksp,x) KSPSetUp(ksp). Similarly SLESSolve(sles,b,x) should be replaced with KSPSetRhs(ksp,b)
KSPSetSolution(ksp,x) KSPSolve(ksp)
<li>removed its argument from KSPSolve. Obtain the number of iterations via KSPGetIterationNumber()</ul>
<p><u><b>SNES:</b></u></p>
<ul><li>SNESSolve() no longer returns number of iterations, use SNESGetIterationNumber() to get the
number of iterations required</ul>
<p> <u><b>TS:<br>
</b></u></p>
<ul>
</ul>
<p><span style="font-weight: bold; text-decoration: underline;">DMMG:</span><br></p>
<ul><li>Added support for -dmmg_galerkin and DMMGSetUseGalerkin() for nonlinear problems (not sequential only)</ul>
<p><span style="font-weight: bold; text-decoration: underline;">SYS:</span></p>
<ul><li>added new PETSC_VIEWER_MATLAB for saving variables to Matlab .mat files
<li>eliminated PetscViewerXXXXType and PetscViewerXXXSetType() replaced with
PetscViewerFileType and PetscViewerSetFileType()
<li>PETSC_BINARY_RDONLY,PETSC_BINARY_WRONLY,PETSC_BINARY_CREATE becomes PETSC_FILE_RDONLY,PETSC_FILE_WRONLY,PETSC_FILE_CREATE</ul>
<p><span style="font-weight: bold; text-decoration: underline;">Fortran:</span><br></p>
<p><br><span style="font-weight: bold; text-decoration: underline;">ExternalPackages:</span><br></p>
</ul>
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