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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="DMGetAdjacency"><H1>DMGetAdjacency</H1></A>
Returns the flags for determining variable influence
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscdm.h"
#include "petscdmlabel.h"
#include "petscds.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../DM/DMGetAdjacency.html#DMGetAdjacency">DMGetAdjacency</A>(<A HREF="../DM/DM.html#DM">DM</A> dm, <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> f, <A HREF="../Sys/PetscBool.html#PetscBool">PetscBool</A> *useCone, <A HREF="../Sys/PetscBool.html#PetscBool">PetscBool</A> *useClosure)
</PRE>
Not collective
<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>dm </B></TD><TD>- The <A HREF="../DM/DM.html#DM">DM</A> object
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>f </B></TD><TD>- The field number, or <A HREF="../Sys/PETSC_DEFAULT.html#PETSC_DEFAULT">PETSC_DEFAULT</A> for the default adjacency
</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>useCone </B></TD><TD>- Flag for variable influence starting with the cone operation
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>useClosure </B></TD><TD>- Flag for variable influence using transitive closure
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
<pre>
FEM: Two points p and q are adjacent if q \in closure(star(p)), useCone = <A HREF="../Sys/PETSC_FALSE.html#PETSC_FALSE">PETSC_FALSE</A>, useClosure = <A HREF="../Sys/PETSC_TRUE.html#PETSC_TRUE">PETSC_TRUE</A>
</pre>
<pre>
FVM: Two points p and q are adjacent if q \in support(p+cone(p)), useCone = <A HREF="../Sys/PETSC_TRUE.html#PETSC_TRUE">PETSC_TRUE</A>, useClosure = <A HREF="../Sys/PETSC_FALSE.html#PETSC_FALSE">PETSC_FALSE</A>
</pre>
<pre>
FVM++: Two points p and q are adjacent if q \in star(closure(p)), useCone = <A HREF="../Sys/PETSC_TRUE.html#PETSC_TRUE">PETSC_TRUE</A>, useClosure = <A HREF="../Sys/PETSC_TRUE.html#PETSC_TRUE">PETSC_TRUE</A>
</pre>
Further explanation can be found in the User's Manual Section on the Influence of Variables on One Another.
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../DM/DMSetAdjacency.html#DMSetAdjacency">DMSetAdjacency</A>(), <A HREF="../DM/DMGetField.html#DMGetField">DMGetField</A>(), <A HREF="../DM/DMSetField.html#DMSetField">DMSetField</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/dm/interface/dm.c.html#DMGetAdjacency">src/dm/interface/dm.c</A>
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