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<H1>EPSGetInvariantSubspaceLeft</H1>
Gets an orthonormal basis of the computed left invariant subspace (only available in two-sided eigensolvers).
<H3><FONT COLOR="#883300">Synopsis</FONT></H3>
<PRE>
#include "slepceps.h"
PetscErrorCode EPSGetInvariantSubspaceLeft(EPS eps,Vec *v)
</PRE>
Not Collective, but vectors are shared by all processors that share the <A HREF="../EPS/EPS.html#EPS">EPS</A>
<P>
<H3><FONT COLOR="#883300">Input Parameter</FONT></H3>
<DT><B>eps </B> - the eigensolver context
<br>
<H3><FONT COLOR="#883300">Output Parameter</FONT></H3>
<DT><B>v </B> - an array of vectors
<br>
<P>
<H3><FONT COLOR="#883300">Notes</FONT></H3>
This function should be called after <A HREF="../EPS/EPSSolve.html#EPSSolve">EPSSolve</A>() has finished.
<P>
The user should provide in v an array of nconv vectors, where nconv is
the value returned by <A HREF="../EPS/EPSGetConverged.html#EPSGetConverged">EPSGetConverged</A>().
<P>
The first k vectors returned in v span a left invariant subspace associated
with the first k computed eigenvalues (note that this is not true if the
k-th eigenvalue is complex and matrix A is real; in this case the first
k+1 vectors should be used). A left invariant subspace Y of A satisfies y'A
in Y for all y in Y (a similar definition applies for generalized
eigenproblems).
<P>
<P>
<H3><FONT COLOR="#883300">See Also</FONT></H3>
<A HREF="../EPS/EPSGetEigenpair.html#EPSGetEigenpair">EPSGetEigenpair</A>(), <A HREF="../EPS/EPSGetConverged.html#EPSGetConverged">EPSGetConverged</A>(), <A HREF="../EPS/EPSSolve.html#EPSSolve">EPSSolve</A>(), <A HREF="../EPS/EPSGetInvariantSubspace.html#EPSGetInvariantSubspace">EPSGetInvariantSubspace</A>
<BR><P><B><FONT COLOR="#883300">Location: </FONT></B><A HREF="../../../src/eps/interface/solve.c.html#EPSGetInvariantSubspaceLeft">src/eps/interface/solve.c</A>
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