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<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/IS/ISIdentity.html "><small>Report Typos and Errors</small></a></div>
<A NAME="ISIdentity"><H1>ISIdentity</H1></A>
Determines whether index set is the identity mapping.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscis.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../IS/ISIdentity.html#ISIdentity">ISIdentity</A>(<A HREF="../IS/IS.html#IS">IS</A> is,<A HREF="../Sys/PetscBool.html#PetscBool">PetscBool</A> *ident)
</PRE>
Collective on <A HREF="../IS/IS.html#IS">IS</A>
<P>
<H3><FONT COLOR="#CC3333">Input Parmeters</FONT></H3>
<DT><B>is </B> -the index set
<br>
<P>
<H3><FONT COLOR="#CC3333">Output Parameters</FONT></H3>
<DT><B>ident </B> -<A HREF="../Sys/PETSC_TRUE.html#PETSC_TRUE">PETSC_TRUE</A> if an identity, else <A HREF="../Sys/PETSC_FALSE.html#PETSC_FALSE">PETSC_FALSE</A>
<br>
<P>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../IS/ISSetIdentity.html#ISSetIdentity">ISSetIdentity</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/is/is/interface/index.c.html#ISIdentity">src/vec/is/is/interface/index.c</A>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/vec/is/is/impls/block/block.c.html#ISIdentity_Block">ISIdentity_Block in src/vec/is/is/impls/block/block.c</A><BR>
<A HREF="../../../src/vec/is/is/impls/general/general.c.html#ISIdentity_General">ISIdentity_General in src/vec/is/is/impls/general/general.c</A><BR>
<A HREF="../../../src/vec/is/is/impls/stride/stride.c.html#ISIdentity_Stride">ISIdentity_Stride in src/vec/is/is/impls/stride/stride.c</A><BR>
<BR><A HREF="./index.html">Index of all IS routines</A>
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