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<div id="version" align=right><b>slepc-3.23.1 2025-05-01</b></div>
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<H1>BVMultInPlace</H1>
Update a set of vectors as V(:,s:e-1) = V*Q(:,s:e-1).
<H3><FONT COLOR="#883300">Synopsis</FONT></H3>
<PRE>
#include "slepcbv.h"
<A HREF="https://petsc.org/release/manualpages/Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../BV/BVMultInPlace.html#BVMultInPlace">BVMultInPlace</A>(<A HREF="../BV/BV.html#BV">BV</A> V,<A HREF="https://petsc.org/release/manualpages/Mat/Mat.html#Mat">Mat</A> Q,<A HREF="https://petsc.org/release/manualpages/Sys/PetscInt.html#PetscInt">PetscInt</A> s,<A HREF="https://petsc.org/release/manualpages/Sys/PetscInt.html#PetscInt">PetscInt</A> e)
</PRE>
Logically Collective
<P>
<H3><FONT COLOR="#883300">Input Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>Q </B></TD><TD> - a sequential dense matrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>s </B></TD><TD> - first column of V to be overwritten
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>e </B></TD><TD> - first column of V not to be overwritten
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Input/Output Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>V </B></TD><TD> - basis vectors
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Notes</FONT></H3>
The matrix Q must be a sequential dense <A HREF="https://petsc.org/release/manualpages/Mat/Mat.html#Mat">Mat</A>, with all entries equal on
all processes (otherwise each process will compute a different update).
<P>
This function computes V(:,s:e-1) = V*Q(:,s:e-1), that is, given a set of
vectors V, columns from s to e-1 are overwritten with columns from s to
e-1 of the matrix-matrix product V*Q. Only columns s to e-1 of Q are
referenced.
<P>
<P>
<H3><FONT COLOR="#883300">See Also</FONT></H3>
<A HREF="../BV/BVMult.html#BVMult">BVMult</A>(), <A HREF="../BV/BVMultVec.html#BVMultVec">BVMultVec</A>(), <A HREF="../BV/BVMultInPlaceHermitianTranspose.html#BVMultInPlaceHermitianTranspose">BVMultInPlaceHermitianTranspose</A>(), <A HREF="../BV/BVSetActiveColumns.html#BVSetActiveColumns">BVSetActiveColumns</A>()
<BR><P><B></B><H3><FONT COLOR="#883300">Level</FONT></H3>intermediate<BR>
<H3><FONT COLOR="#883300">Location</FONT></H3>
</B><A HREF="../../../src/sys/classes/bv/interface/bvops.c.html#BVMultInPlace">src/sys/classes/bv/interface/bvops.c</A>
<BR><BR><A HREF="./index.html">Index of all BV routines</A>
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