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<div id="version" align=right><b>slepc-3.23.1 2025-05-01</b></div>
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<H1>DSMatType</H1>
Used to refer to one of the matrices stored internally in <A HREF="../DS/DS.html#DS">DS</A>
<H3><FONT COLOR="#883300">Synopsis</FONT></H3>
<PRE>
typedef enum { <A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_A</A>,
<A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_B</A>,
<A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_C</A>,
<A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_T</A>,
<A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_D</A>,
<A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_Q</A>,
<A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_Z</A>,
<A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_X</A>,
<A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_Y</A>,
<A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_U</A>,
<A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_V</A>,
<A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_W</A>,
<A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_E0</A>,
<A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_E1</A>,
<A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_E2</A>,
<A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_E3</A>,
<A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_E4</A>,
<A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_E5</A>,
<A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_E6</A>,
<A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_E7</A>,
<A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_E8</A>,
<A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_E9</A>,
<A HREF="../DS/DSMatType.html#DSMatType">DS_NUM_MAT</A> } <A HREF="../DS/DSMatType.html#DSMatType">DSMatType</A>;
</PRE>
<H3><FONT COLOR="#883300">Notes</FONT></H3>
The matrices preferentially refer to
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B><A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_A</A> </B></TD><TD> - first matrix of eigenproblem/singular value problem
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B><A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_B</A> </B></TD><TD> - second matrix of a generalized eigenproblem
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B><A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_C</A> </B></TD><TD> - third matrix of a quadratic eigenproblem (deprecated)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B><A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_T</A> </B></TD><TD> - tridiagonal matrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B><A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_D</A> </B></TD><TD> - diagonal matrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B><A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_Q</A> </B></TD><TD> - orthogonal matrix of (right) Schur vectors
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B><A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_Z</A> </B></TD><TD> - orthogonal matrix of left Schur vectors
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B><A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_X</A> </B></TD><TD> - right eigenvectors
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B><A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_Y</A> </B></TD><TD> - left eigenvectors
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B><A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_U</A> </B></TD><TD> - left singular vectors
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B><A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_V</A> </B></TD><TD> - right singular vectors
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B><A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_W</A> </B></TD><TD> - workspace matrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>DS_MAT_Ex </B></TD><TD> - extra matrices (x=0,..,9)
</TD></TR></TABLE>
<P>
All matrices can have space to hold ld x ld elements, except for
<A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_T</A> that has space for 3 x ld elements (ld = leading dimension)
and <A HREF="../DS/DSMatType.html#DSMatType">DS_MAT_D</A> that has space for just ld elements.
<P>
In <A HREF="../DS/DSPEP.html#DSPEP">DSPEP</A> problems, matrices A, B, W can have space for d*ld x d*ld,
where d is the polynomial degree, and X can have ld x d*ld.
Also <A HREF="../DS/DSNEP.html#DSNEP">DSNEP</A> has exceptions. Check the manual page of each <A HREF="../DS/DS.html#DS">DS</A> type
for details.
<P>
<P>
<H3><FONT COLOR="#883300">See Also</FONT></H3>
<A HREF="../DS/DSAllocate.html#DSAllocate">DSAllocate</A>(), <A HREF="../DS/DSGetArray.html#DSGetArray">DSGetArray</A>(), <A HREF="../DS/DSGetArrayReal.html#DSGetArrayReal">DSGetArrayReal</A>(), <A HREF="../DS/DSVectors.html#DSVectors">DSVectors</A>()
<BR><P><B></B><H3><FONT COLOR="#883300">Level</FONT></H3>advanced<BR>
<H3><FONT COLOR="#883300">Location</FONT></H3>
</B><A HREF="../../../include/slepcds.h.html#DSMatType">include/slepcds.h</A>
<BR><BR><A HREF="./index.html">Index of all DS routines</A>
<BR><A HREF="../../../docs/manual.html">Table of Contents for all manual pages</A>
<BR><A HREF="../singleindex.html">Index of all manual pages</A>
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