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<title>Documentation: Changes: 2.1.2</title>
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<div id="version" align=right><b>petsc-3.4.2 2013-07-02</b></div>
<h1>Documentation: Changes: 2.1.2</h1>
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<h2><a name="CHANGES">CHANGES in PETSc 2.1.2</a></h2>
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<h4>General:</h4>
<ul>
<li>Win32fe now takes --nt4 option for compatibility on NT4</li>
<li>Supports cygwinpaths in win32fe</li>
<li>Better support for borland tools</li>
<li>Added PetscOptionsInsertString()</li>
<li>Allow full path of debugger to be specified using -start_in_debugger option</li>
<li>Better hyperlinks across documentation (including users manual)</li>
</ul>
<h4>ADIC:</h4>
<ul>
<li>Support for global reductions on local functions</li>
<li>Allow coloring of periodic grids</li>
</ul>
<h4>AO (Application Orderings):</h4>
<h4>TS (Timestepping Solvers):</h4>
<h4>DMMG:</h4>
<h4>SNES (Nonlinear Solvers):</h4>
<ul>
<li>Removed all minimization support in PETSc. TAO package should be used for this functionality.</li>
</ul>
<h4>SLES (Linear Solvers):</h4>
<h4>KSP (Krylov Subspace Methods):</h4>
<ul>
<li>Support -ksp_unpreconditioned_norm in -ksp_type cr</li>
</ul>
<h4>PC (Preconditioners):</h4>
<ul>
<li>Added support for PCType PCMAT (PC based on a matvec)</li>
<li>Added support for PCType PCHYPRE (includes PILUT, EUCLID, and BoomerAMG)</li>
<li>Cholesky - additional info from factorization</li>
</ul>
<h4>MAT (Matrices):</h4>
<ul>
<li>SBAIJ matmult - improve performance by optimizing communication.</li>
<li>markdiagonal - performance optimization.</li>
<li>SuperLU interface improved (check page 75 in the user's manual)</li>
<li>DSCPACK interface inproved</li>
<li>Spooles interface added</li>
</ul>
<h4>DA (Distributed Arrays):</h4>
<h4>VEC (Vectors):</h4>
<h4>IS (Index Sets):</h4>
<h4>Draw (Graphics):</h4>
<ul>
<li>Added flag to support turning off axis resizing</li>
</ul>
<h4>Viewers:</h4>
<ul>
<li>Allow drawing rectangles in postscript</li>
</ul>
<h4>System:</h4>
<h4>Error Handling:</h4>
<h4>Event Logging:</h4>
<h4>Fortran Interface:</h4>
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