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<div id="version" align=right><b>petsc-3.14.5 2021-03-03</b></div>
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<A NAME="MatNullSpaceGetVecs"><H1>MatNullSpaceGetVecs</H1></A>
get vectors defining the null space
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscmat.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../Mat/MatNullSpaceGetVecs.html#MatNullSpaceGetVecs">MatNullSpaceGetVecs</A>(<A HREF="../Mat/MatNullSpace.html#MatNullSpace">MatNullSpace</A> sp,<A HREF="../Sys/PetscBool.html#PetscBool">PetscBool</A> *has_const,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> *n,const <A HREF="../Vec/Vec.html#Vec">Vec</A> **vecs)
</PRE>
Not Collective
<P>
<H3><FONT COLOR="#CC3333">Input Arguments</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>sp </B></TD><TD>- null space object
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Arguments</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>has_cnst </B></TD><TD>- <A HREF="../Sys/PETSC_TRUE.html#PETSC_TRUE">PETSC_TRUE</A> if the null space contains the constant vector, otherwise <A HREF="../Sys/PETSC_FALSE.html#PETSC_FALSE">PETSC_FALSE</A>
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>n </B></TD><TD>- number of vectors (excluding constant vector) in null space
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>vecs </B></TD><TD>- orthonormal vectors that span the null space (excluding the constant vector)
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
These vectors and the array are owned by the <A HREF="../Mat/MatNullSpace.html#MatNullSpace">MatNullSpace</A> and should not be destroyed or freeded by the caller
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Mat/MatNullSpaceCreate.html#MatNullSpaceCreate">MatNullSpaceCreate</A>(), <A HREF="../Mat/MatGetNullSpace.html#MatGetNullSpace">MatGetNullSpace</A>(), <A HREF="../Mat/MatGetNearNullSpace.html#MatGetNearNullSpace">MatGetNearNullSpace</A>()
<BR><P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>developer<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/mat/interface/matnull.c.html#MatNullSpaceGetVecs">src/mat/interface/matnull.c</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/ksp/ksp/tutorials/ex49.c.html">src/ksp/ksp/tutorials/ex49.c.html</A><BR>
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