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<div id="version" align=right><b>petsc-3.7.5 2017-01-01</b></div>
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<A NAME="TaoSubsetType"><H1>TaoSubsetType</H1></A>
<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> representing the way TAO handles active sets
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
typedef enum {TAO_SUBSET_SUBVEC,TAO_SUBSET_MASK,TAO_SUBSET_MATRIXFREE} <A HREF="../Tao/TaoSubsetType.html#TaoSubsetType">TaoSubsetType</A>;
</PRE>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>TAO_SUBSET_SUBVEC </B></TD><TD>- TAO uses PETSc's <A HREF="../Mat/MatGetSubMatrix.html#MatGetSubMatrix">MatGetSubMatrix</A> and <A HREF="../Vec/VecGetSubVector.html#VecGetSubVector">VecGetSubVector</A>
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>TAO_SUBSET_MASK </B></TD><TD>- Matrices are zeroed out corresponding to active set entries
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>TAO_SUBSET_MATRIXFREE </B></TD><TD>- Same as TAO_SUBSET_MASK, but can be applied to matrix-free operators
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Options database keys</FONT></H3>
<DT><B>-different_hessian </B> -TAO will use a copy of the hessian operator for masking. By default
TAO will directly alter the hessian operator.
<br>
<P>
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/tao/../../include/petsctao.h.html#TaoSubsetType">src/tao/../../include/petsctao.h</A>
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