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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="PetscDTAltVInteriorPattern"><H1>PetscDTAltVInteriorPattern</H1></A>
compute the sparsity and sign pattern of the interior product matrix computed in <A HREF="../DT/PetscDTAltVInteriorMatrix.html#PetscDTAltVInteriorMatrix">PetscDTAltVInteriorMatrix</A>()
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscdt.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../DT/PetscDTAltVInteriorPattern.html#PetscDTAltVInteriorPattern">PetscDTAltVInteriorPattern</A>(<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> N, <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> k, <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> (*indices)[3])
</PRE>
<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>N </B></TD><TD>- the dimension of the vector space, N >= 0
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>k </B></TD><TD>- the degree of the k-forms on which intvMat from <A HREF="../DT/PetscDTAltVInteriorMatrix.html#PetscDTAltVInteriorMatrix">PetscDTAltVInteriorMatrix</A>() acts, 0 <= k <= N.
</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>indices </B></TD><TD>- The interior product matrix intvMat has size [(N choose (k-1)) x (N choose k)] and has (N choose k) * k
non-zeros. indices[i][0] and indices[i][1] are the row and column of a non-zero, and its value is equal to the vector
coordinate v[j] if indices[i][2] = j, or -v[j] if indices[i][2] = -(j+1)
</TD></TR></TABLE>
<P>
<P>
Note: this function is useful when the interior product needs to be computed at multiple locations, as when computing the Koszul differential
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../DT/PetscDTAltV.html#PetscDTAltV">PetscDTAltV</A>, <A HREF="../DT/PetscDTAltVInterior.html#PetscDTAltVInterior">PetscDTAltVInterior</A>(), <A HREF="../DT/PetscDTAltVInteriorMatrix.html#PetscDTAltVInteriorMatrix">PetscDTAltVInteriorMatrix</A>(), <A HREF="../DT/PetscDTAltVPullback.html#PetscDTAltVPullback">PetscDTAltVPullback</A>(), <A HREF="../DT/PetscDTAltVPullbackMatrix.html#PetscDTAltVPullbackMatrix">PetscDTAltVPullbackMatrix</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/dm/dt/interface/dtaltv.c.html#PetscDTAltVInteriorPattern">src/dm/dt/interface/dtaltv.c</A>
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