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<A NAME="ISLocalToGlobalMapping"><H1>ISLocalToGlobalMapping</H1></A>
mappings from an arbitrary local ordering from 0 to n-1 to a global PETSc ordering used by a vector or matrix.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
struct _p_ISLocalToGlobalMapping{
PETSCHEADER(int)
int n; /* number of local indices */
int *indices; /* global index of each local index */
int globalstart; /* first global referenced in indices */
int globalend; /* last + 1 global referenced in indices */
int *globals; /* local index for each global index between start and end */
};
</PRE>
<P>
Note: mapping from Local to Global is scalable; but Global
to Local may not be if the range of global values represented locally
is very large.
<P>
Note: the <A HREF="../IS/ISLocalToGlobalMapping.html#ISLocalToGlobalMapping">ISLocalToGlobalMapping</A> is actually a private object; it is included
here for the MACRO <A HREF="../IS/ISLocalToGlobalMappingApply.html#ISLocalToGlobalMappingApply">ISLocalToGlobalMappingApply</A>() to allow it to be inlined since
it is used so often.
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../IS/ISLocalToGlobalMappingCreate.html#ISLocalToGlobalMappingCreate">ISLocalToGlobalMappingCreate</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/vec/is/../../../include/petscis.h.html#ISLocalToGlobalMapping">src/vec/is/../../../include/petscis.h</A>
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