1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML3.2 EN">
<HTML>
<HEAD> <link rel="canonical" href="http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/PC/PCHYPRESetDiscreteGradient.html" />
<META NAME="GENERATOR" CONTENT="DOCTEXT">
<TITLE>PCHYPRESetDiscreteGradient</TITLE>
</HEAD>
<BODY BGCOLOR="FFFFFF">
<div id="version" align=right><b>petsc-3.10.3 2018-12-18</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-3.10.3 v3.10.3 docs/manualpages/PC/PCHYPRESetDiscreteGradient.html "><small>Report Typos and Errors</small></a></div>
<A NAME="PCHYPRESetDiscreteGradient"><H1>PCHYPRESetDiscreteGradient</H1></A>
Set discrete gradient matrix
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscpc.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../PC/PCHYPRESetDiscreteGradient.html#PCHYPRESetDiscreteGradient">PCHYPRESetDiscreteGradient</A>(<A HREF="../PC/PC.html#PC">PC</A> pc, <A HREF="../Mat/Mat.html#Mat">Mat</A> G)
</PRE>
Collective on <A HREF="../PC/PC.html#PC">PC</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>pc </B></TD><TD>- the preconditioning context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>G </B></TD><TD>- the discrete gradient
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
G should have as many rows as the number of edges and as many columns as the number of vertices in the mesh
Each row of G has 2 nonzeros, with column indexes being the global indexes of edge's endpoints: matrix entries are +1 and -1 depending on edge orientation
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<BR><P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>intermediate<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/ksp/pc/impls/hypre/hypre.c.html#PCHYPRESetDiscreteGradient">src/ksp/pc/impls/hypre/hypre.c</A>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/ksp/pc/impls/hypre/hypre.c.html#PCHYPRESetDiscreteGradient_HYPRE">PCHYPRESetDiscreteGradient_HYPRE in src/ksp/pc/impls/hypre/hypre.c</A><BR>
<BR><A HREF="./index.html">Index of all PC routines</A>
<BR><A HREF="../../index.html">Table of Contents for all manual pages</A>
<BR><A HREF="../singleindex.html">Index of all manual pages</A>
</BODY></HTML>
|
