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<div id="version" align=right><b>petsc-3.14.5 2021-03-03</b></div>
<div id="bugreport" align=right><a href="mailto:petsc-maint@mcs.anl.gov?subject=Typo or Error in Documentation &body=Please describe the typo or error in the documentation: petsc-3.14.5 v3.14.5 docs/manualpages/Vec/VecMTDot.html "><small>Report Typos and Errors</small></a></div>
<A NAME="VecMTDot"><H1>VecMTDot</H1></A>
Computes indefinite vector multiple dot products. That is, it does NOT use the complex conjugate.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscvec.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../Vec/VecMTDot.html#VecMTDot">VecMTDot</A>(<A HREF="../Vec/Vec.html#Vec">Vec</A> x,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> nv,const <A HREF="../Vec/Vec.html#Vec">Vec</A> y[],<A HREF="../Sys/PetscScalar.html#PetscScalar">PetscScalar</A> val[])
</PRE>
Collective on <A HREF="../Vec/Vec.html#Vec">Vec</A>
<P>
<H3><FONT COLOR="#CC3333">Input Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>x </B></TD><TD>- one vector
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>nv </B></TD><TD>- number of vectors
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>y </B></TD><TD>- array of vectors. Note that vectors are pointers
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>val </B></TD><TD>- array of the dot products
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Notes for Users of Complex Numbers</FONT></H3>
For complex vectors, <A HREF="../Vec/VecMTDot.html#VecMTDot">VecMTDot</A>() computes the indefinite form
<pre>
val = (x,y) = y^T x,
</pre>
where y^T denotes the transpose of y.
<P>
Use <A HREF="../Vec/VecMDot.html#VecMDot">VecMDot</A>() for the inner product
<pre>
val = (x,y) = y^H x,
</pre>
where y^H denotes the conjugate transpose of y.
<P>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Vec/VecMDot.html#VecMDot">VecMDot</A>(), <A HREF="../Vec/VecTDot.html#VecTDot">VecTDot</A>()
<BR><P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>intermediate<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/vec/vec/interface/rvector.c.html#VecMTDot">src/vec/vec/interface/rvector.c</A>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/vec/vec/impls/mpi/pvec2.c.html#VecMTDot_MPI">VecMTDot_MPI in src/vec/vec/impls/mpi/pvec2.c</A><BR>
<A HREF="../../../src/vec/vec/impls/nest/vecnest.c.html#VecMTDot_Nest">VecMTDot_Nest in src/vec/vec/impls/nest/vecnest.c</A><BR>
<A HREF="../../../src/vec/vec/impls/seq/dvec2.c.html#VecMTDot_Seq">VecMTDot_Seq in src/vec/vec/impls/seq/dvec2.c</A><BR>
<A HREF="../../../src/vec/vec/impls/seq/seqviennacl/vecviennacl.cxx.html#VecMTDot_SeqViennaCL">VecMTDot_SeqViennaCL in src/vec/vec/impls/seq/seqviennacl/vecviennacl.cxx</A><BR>
<BR><A HREF="./index.html">Index of all Vec routines</A>
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