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<H1>STComputeExplicitOperator</H1>
Computes the explicit operator associated to the eigenvalue problem with the specified spectral transformation.
<H3><FONT COLOR="#883300">Synopsis</FONT></H3>
<PRE>
#include "slepcst.h"
PetscErrorCode STComputeExplicitOperator(ST st,Mat *mat)
</PRE>
Collective on <A HREF="../ST/ST.html#ST">ST</A>
<P>
<H3><FONT COLOR="#883300">Input Parameter</FONT></H3>
<DT><B>st </B> - the spectral transform context
<br>
<P>
<H3><FONT COLOR="#883300">Output Parameter</FONT></H3>
<DT><B>mat </B> - the explicit operator
<br>
<P>
<H3><FONT COLOR="#883300">Notes</FONT></H3>
This routine builds a matrix containing the explicit operator. For
example, in generalized problems with shift-and-invert spectral
transformation the result would be matrix (A - s B)^-1 B.
<P>
This computation is done by applying the operator to columns of the
identity matrix. This is analogous to MatComputeExplicitOperator().
<P>
<P>
<H3><FONT COLOR="#883300">See Also</FONT></H3>
<A HREF="../ST/STApply.html#STApply">STApply</A>()
<BR><P><B><FONT COLOR="#883300">Location: </FONT></B><A HREF="../../../src/st/interface/stsolve.c.html#STComputeExplicitOperator">src/st/interface/stsolve.c</A>
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